# The Twenty-Fourth Door: A Christmas Escape Room Advent Calendar Puzzle Book for Adults - **Author:** Filip S. (Croatia, European Union) - **Brand Promise:** A plan, not a promise. - **Category:** Brain Training & Mystery Puzzles - **Digital Price:** $21.99 USD (Instant Download) - **Included Formats:** PDF — fixed-layout digital edition - **Length:** 108 pages (~178 min read) - **Language:** English - **Canonical Product URL:** https://filips-academy.com/books/the-twenty-fourth-door ## Overview & Core Problem Solved Twenty-four days. Twenty-four locks. One stolen star. It is the first of December, and somebody inside this building means to steal the Marchmont Star. You are the new night security officer at a seven-floor department store: two hundred and eleven keys, a boiler older than anyone still working there, and a Christmas Eve ceremony at five o'clock when a glass-and-silver ornament made in 1888 comes out of the strongroom and goes up on the tree. It is not going to get there. You have twenty-four days to work out who , how and when — and everything you need is printed inside. Open one day at a time. Each day gives you what happened, the piece of paper it turns on, and one puzzle. Every puzzle answer is a number. Take it to the Key Board at the back and read that entry: if you were right, the case moves on. If you were wrong, the drawer is empty and you go back and work it again. ## What You Will Put in Place - One unbroken mystery across twenty-four days — not twenty-four unrelated brain teasers - Ciphers, logic grids, timetables, floor plans, sequences and pre-decimal money - Twenty-four drawn exhibits: the store in section, the pneumatic tubes, the ledger, the rota, the staircase, the insurance photograph - Three hints for every puzzle — a nudge, a method, and the answer — shuffled with an index so your eye cannot catch the next one - A full solution, and seven rules of fair play printed before the first of December and kept ## Who This Book Is For - Adults who love fair-play logic puzzles, mystery casefiles, spatial challenges, and escape-room books - Gift buyers looking for an instant printable activity book for parents, partners, holiday evenings, or travel - iPad / tablet stylus users and pen-and-paper solvers who want crisp, full-page printable layouts ## Honest Scope ("A Plan, Not a Promise") - **What this book IS:** A fair-play, screen-free collection of original puzzles, drawn exhibits, tiered hints, and structured daily or episodic sessions—delivered as a high-resolution Printable PDF + Tablet Stylus edition. - **What this book is NOT:** Not a medical treatment and never marketed with exaggerated claims of 'raising IQ' or preventing neurological disease. - **Notice:** Designed for enjoyment, structured mental engagement, and screen-free routine — not medical advice or clinical cognitive therapy. ## Table of Contents / Structure 01. DAY 1 · MONDAY 1 DECEMBER 02. DAY 2 · TUESDAY 2 DECEMBER 03. DAY 3 · WEDNESDAY 3 DECEMBER 04. DAY 4 · THURSDAY 4 DECEMBER 05. DAY 5 · FRIDAY 5 DECEMBER 06. DAY 6 · SATURDAY 6 DECEMBER 07. DAY 7 · SUNDAY 7 DECEMBER 08. DAY 8 · MONDAY 8 DECEMBER 09. DAY 9 · TUESDAY 9 DECEMBER 10. DAY 10 · WEDNESDAY 10 DECEMBER 11. DAY 11 · THURSDAY 11 DECEMBER 12. DAY 12 · FRIDAY 12 DECEMBER ## Free Sample Excerpt (DAY 1 · MONDAY 1 DECEMBER) > This is a work of fiction. Halbury, Cathedral Row, Marchmont & Sons and every person in this book are invented. Any resemblance to real persons, living or dead, or to real places or businesses, is coincidental. > No part of this book may be reproduced or transmitted in any form without the prior written permission of the author, except for brief quotations in a review. > Open one day at a time, from the first of December to the twenty-fourth. Each day has three parts: what happened, the piece of paper it turns on, and the puzzle. > Every puzzle gives you a number. Take that number to THE KEY BOARD at the back of this book and read the entry beside it. If the entry tells you something about the case, you were right. If it tells you that the drawer is empty, you were not, and you should go back and work it again. ## Bundle Option Included in **The Complete Escape Room & Detective Mystery Collection** (5 ebooks for $65.99 USD — save 33%): https://filips-academy.com/bundles/black-clock-mystery-collection ## Frequently Asked Questions ### What digital formats do I receive immediately when I buy The Twenty-Fourth Door? This title is supplied as PDF. Check the reading guide for compatible software. No physical book or e-reader is included. ### Who is The Twenty-Fourth Door written for—and do I need technical or specialist background? The Twenty-Fourth Door is written in plain, direct English for busy readers solving a specific problem. Every term, script, or step is explained on the page without filler or assumed insider jargon. ### Can I read this ebook on my Kindle, iPad, iPhone, or Android phone? This title is supplied as PDF. Check the reading guide for compatible software. No physical book or e-reader is included. ### How is Filip S.'s approach different from generic AI or self-help books? Every book follows one editorial rule: 'A plan, not a promise.' Instead of motivational padding or unverified claims, you get concrete scripts, checklists, decision trees, and honest scope boundaries. ### Can I save money if I want multiple books in this topic lane? Yes. Every single-book page includes a one-tap Digital Bundle upgrade that pairs related titles in the same category at up to 35% off individual ebook prices.