Turning Activities Into Experiences Worth Remembering

Step into Detective Adam’s case files, where every word search reveals a clue and each solved case draws you deeper into a larger mystery.

Discover a calmer way to color, where one simple color and dotted areas remove the guesswork and turn each page into a peaceful creative escape.

Enter the Vault

About Logic Vault BooksLogic Vault Books creates interactive activity books for curious minds who want more from their quiet time.Some books pull you into clues, tension, and hidden truths.
Others slow the noise down with bold, calming pages for focus and relaxation.Each experience is designed to make you notice more, feel more involved, and finish with the quiet satisfaction of completing something with purpose.Not ordinary puzzles.Not ordinary coloring pages.A different kind of quiet escape.For curious minds who want quiet time to feel more focused, more creative, and a little unexpected.Turning Activities Into Experiences Worth Remembering.

© Logic Vault Books. All rights reserved.
Official author contact: [email protected]

Privacy Policy

Last updated: May 2026

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When you join the Vault List, we collect your email address so we can send you bonus clues, early previews, free case file updates, and news about future puzzle books.

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We do not sell your personal information.

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Mystery Puzzle Books

Listen to the Case Theme

GET YOUR FREE CASE FILE PACK

A printable preview, exclusive bonus content, and first access to what opens next.
4-CASE PRINTABLE SAMPLER
Try four playable cases before you buy the full book.
OFFICIAL STORY THEME TRACK
Download the original Detective Adam theme and keep it.
YOUR DETECTIVE BADGE
Claim your badge as part of the case-file experience.
SERIES UPDATES
Be first to hear about new volumes, seasonal releases, and what opens next.
Stay on the trail. Don’t miss what opens next.

Murder Mystery Word Search
Volume 1

4-Layer Investigation Preview

Murder Mystery Word Search
Volume 2

4-Layer Investigation Preview

Monochrome Coloring Books

Want to color them again your way?
Join the coloring list for free printable pages, future bonus designs, and creative extras.

Monochrome Coloring Book
for Adults:
One-Color Relaxation Designs
with Guided Spaces

Monochrome Coloring Book Preview

Monochrome Coloring Book
for Adults:
50+ Guided
One-Color Designs
for Relaxation
Botanicals • Gardens • Floral Designs

Monochrome Coloring Book Preview

Want to color them again your way?
Join the coloring list for free printable pages, future bonus designs, and creative extras.

Your Words Can Make a Real Difference

Thank you for sharing your experience.
Every honest review helps other readers choose with confidence.
As a new independent publisher, your review means far more than a number. It tells us the time, care, and hope behind each book reached a real person, helping our growing brand keep creating and reach more readers.Choose your Amazon store below. No need to overthink it. A few genuine words are enough, and you can update your review anytime.
If you'd like, a photo or short video can give others a clearer, more personal look at your experience.

Your Words Can Make a Real Difference

Thank you for sharing your experience.
Every honest review helps other readers choose with confidence.
As a new independent publisher, your review means far more than a number. It tells us the time, care, and hope behind each book reached a real person, helping our growing brand keep creating and reach more readers.Choose your Amazon store below. No need to overthink it. A few genuine words are enough, and you can update your review anytime.
If you'd like, a photo or short video can give others a clearer, more personal look at your experience.

Want to try the investigation first?

Solve one free mini case before opening the full investigation.

CONFIDENTIAL
Sealed Evidence Note
Left by Detective Adam
This note was not left for everyone.

It was left for the person who found the first case.

If you are reading this, then Case File #00 is already waiting for you. Solve it, claim your badge, and decide if you are ready to open the full investigation.
— Detective Adam
Case File #00 · Personal evidence access

SEE HOW ONE CASE UNFOLDS

One case. Four steps. One hidden truth.
Every page moves the investigation forward.

1. Read the briefing

2. Learn the method

3. Reveal the truth

4. Crack the
case

Try a Mini Case

Search. Deduce. Journal. Reveal.
Maximum 16 characters. This name will appear on your badge after you solve the case.
The truth is not something you just find,
sometimes it finds drag clue
Victim EMPTY
Method EMPTY
Find the listed words. Some answers are hidden inside the grid.
Case Cleared
Badge issued to Detective.
DETECTIVE
Victim: MAYOR
Method: POISON
Missing clue: YOU

The full investigation continues across 100 case files and one hidden truth.
Open the Full Case on Amazon
(function () { const gridLetters = [ ["F","A","E","N","I","G","H","T","S","Y"], ["M","N","D","S","H","G","H","H","A","Z"], ["U","C","A","S","E","A","A","L","R","B"], ["V","W","V","F","L","D","N","E","O","V"], ["J","Q","S","O","O","P","M","T","O","R"], ["K","Y","C","W","O","A","D","T","M","E"], ["P","K","G","I","Y","C","E","E","X","P"], ["H","M","S","O","U","C","U","R","Q","O"], ["Z","O","R","D","T","R","A","C","E","R"], ["N","G","L","A","S","S","C","G","E","T"] ]; const listedWords = ["CASE","NIGHT","ROOM","LETTER","GLASS","SHADOW","REPORT","YOU","LOCK","TRACE"]; const gridWords = ["CASE","NIGHT","ROOM","LETTER","GLASS","SHADOW","REPORT","LOCK","TRACE"]; const hiddenAnswers = ["MAYOR","POISON"]; const found = new Set(); const foundHidden = new Set(); let cluePlaced = false; let startCell = null; let selected = []; let isDragging = false; const grid = document.getElementById("grid"); const wordsBox = document.getElementById("words"); const status = document.getElementById("status"); const revealBox = document.getElementById("revealBox"); const victimBox = document.getElementById("victimBox"); const methodBox = document.getElementById("methodBox"); const clueDrop = document.getElementById("clueDrop"); const detectiveNameInput = document.getElementById("detectiveName"); const badgeName = document.getElementById("badgeName"); const clearedName = document.getElementById("clearedName"); function cleanDetectiveName(value) { let cleaned = value.replace(/[^a-zA-Z0-9 ]/g, ""); cleaned = cleaned.replace(/\s+/g, " ").trim(); return cleaned.slice(0, 16); } function getDetectiveName() { const cleaned = cleanDetectiveName(detectiveNameInput.value); return cleaned ? cleaned : "Detective"; } detectiveNameInput.addEventListener("input", function () { const cleaned = cleanDetectiveName(this.value); if (this.value !== cleaned) { this.value = cleaned; } }); listedWords.forEach(word => { const span = document.createElement("span"); span.className = "word"; span.id = "word-" + word; span.textContent = word; span.draggable = true; span.addEventListener("dragstart", e => { e.dataTransfer.setData("text/plain", word); }); wordsBox.appendChild(span); }); gridLetters.forEach((row, r) => { row.forEach((letter, c) => { const cell = document.createElement("div"); cell.className = "cell"; cell.textContent = letter; cell.dataset.r = r; cell.dataset.c = c; grid.appendChild(cell); }); }); clueDrop.addEventListener("dragover", e => { e.preventDefault(); }); clueDrop.addEventListener("drop", e => { e.preventDefault(); const word = e.dataTransfer.getData("text/plain"); if (word === "YOU") { clueDrop.textContent = "YOU"; document.getElementById("word-YOU").classList.add("done"); cluePlaced = true; status.textContent = "Missing clue placed: YOU"; checkComplete(); } else { status.textContent = "That word does not fit the missing line."; } }); function clearSelecting() { document.querySelectorAll("#mini-case-game .cell.selecting").forEach(cell => { cell.classList.remove("selecting"); }); selected = []; } function getCell(r, c) { return document.querySelector('#mini-case-game .cell[data-r="' + r + '"][data-c="' + c + '"]'); } function buildStraightSelection(endCell) { if (!startCell || !endCell) return; clearSelecting(); const r1 = Number(startCell.dataset.r); const c1 = Number(startCell.dataset.c); const r2 = Number(endCell.dataset.r); const c2 = Number(endCell.dataset.c); const dr = r2 - r1; const dc = c2 - c1; const absR = Math.abs(dr); const absC = Math.abs(dc); if (!(dr === 0 || dc === 0 || absR === absC)) return; const stepR = dr === 0 ? 0 : dr / absR; const stepC = dc === 0 ? 0 : dc / absC; const length = Math.max(absR, absC); for (let i = 0; i <= length; i++) { const cell = getCell(r1 + stepR * i, c1 + stepC * i); if (cell) { cell.classList.add("selecting"); selected.push(cell); } } } function getSelectedWord() { return selected.map(cell => cell.textContent).join(""); } function markFound(type) { selected.forEach(cell => { cell.classList.remove("selecting"); cell.classList.add(type === "hidden" ? "hidden-found" : "found"); }); } function revealVictim() { victimBox.classList.remove("empty"); victimBox.textContent = "MAYOR"; } function revealMethod() { methodBox.classList.remove("empty"); methodBox.textContent = "POISON"; } function finishSelection() { if (!selected.length) return; const word = getSelectedWord(); const reverse = word.split("").reverse().join(""); if (gridWords.includes(word) && !found.has(word)) { found.add(word); document.getElementById("word-" + word).classList.add("done"); markFound("normal"); status.textContent = "Found: " + word; } else if (gridWords.includes(reverse) && !found.has(reverse)) { found.add(reverse); document.getElementById("word-" + reverse).classList.add("done"); markFound("normal"); status.textContent = "Found: " + reverse; } else if (hiddenAnswers.includes(word) && !foundHidden.has(word)) { foundHidden.add(word); markFound("hidden"); if (word === "MAYOR") { revealVictim(); status.textContent = "Victim discovered."; } if (word === "POISON") { revealMethod(); status.textContent = "Method discovered."; } } else if (hiddenAnswers.includes(reverse) && !foundHidden.has(reverse)) { foundHidden.add(reverse); markFound("hidden"); if (reverse === "MAYOR") { revealVictim(); status.textContent = "Victim discovered."; } if (reverse === "POISON") { revealMethod(); status.textContent = "Method discovered."; } } else { clearSelecting(); } selected = []; startCell = null; checkComplete(); } function checkComplete() { const allGridWordsFound = gridWords.every(w => found.has(w)); const allHiddenFound = hiddenAnswers.every(w => foundHidden.has(w)); if (allGridWordsFound && allHiddenFound && cluePlaced) { const name = getDetectiveName(); const fullName = name.toUpperCase().startsWith("DETECTIVE") ? name : "Detective " + name; badgeName.textContent = name.toUpperCase(); clearedName.textContent = fullName; status.textContent = "Case unlocked."; revealBox.style.display = "block"; } } function cellFromPoint(x, y) { const el = document.elementFromPoint(x, y); return el && el.classList.contains("cell") ? el : null; } grid.addEventListener("mousedown", e => { if (!e.target.classList.contains("cell")) return; clearSelecting(); isDragging = true; startCell = e.target; buildStraightSelection(e.target); }); grid.addEventListener("mouseover", e => { if (!isDragging || !e.target.classList.contains("cell")) return; buildStraightSelection(e.target); }); document.addEventListener("mouseup", () => { if (isDragging) finishSelection(); isDragging = false; }); grid.addEventListener("touchstart", e => { const touch = e.touches[0]; const cell = cellFromPoint(touch.clientX, touch.clientY); if (!cell) return; clearSelecting(); isDragging = true; startCell = cell; buildStraightSelection(cell); e.preventDefault(); }, { passive: false }); grid.addEventListener("touchmove", e => { const touch = e.touches[0]; const cell = cellFromPoint(touch.clientX, touch.clientY); if (cell) buildStraightSelection(cell); e.preventDefault(); }, { passive: false }); grid.addEventListener("touchend", e => { finishSelection(); isDragging = false; e.preventDefault(); }, { passive: false }); })();

Get Case File #00 Free

Download the printable mini investigation.
Solve 4 free cases, uncover hidden clues, preview the full Murder Mystery Word Search experience, and download the official case theme track.

Listen to the Case Theme

Your Words Can Make a Real Difference

Thank you for sharing your experience.
Every honest review helps other readers choose with confidence.
As a new independent publisher, your review means far more than a number. It tells us the time, care, and hope behind each book reached a real person, helping our growing brand keep creating and reach more readers.Choose your Amazon store below. No need to overthink it. A few genuine words are enough, and you can update your review anytime.
If you'd like, a photo or short video can give others a clearer, more personal look at your experience.

Your Words Can Make a Real Difference

Thank you for sharing your experience.
Every honest review helps other readers choose with confidence.
As a new independent publisher, your review means far more than a number. It tells us the time, care, and hope behind each book reached a real person, helping our growing brand keep creating and reach more readers.Choose your Amazon store below. No need to overthink it. A few genuine words are enough, and you can update your review anytime.
If you'd like, a photo or short video can give others a clearer, more personal look at your experience.