The Impossible Case Files

Description

THE IMPOSSIBLE CASE FILES

25 Mystery Puzzles for Young Detectives

Six mysteries. Twenty-five puzzles. One detective.

Welcome to Story-Doku — a screen-free detective adventure where the grid is the evidence and every solved puzzle moves the case forward.

Someone has stolen a moonstone.

Someone is signalling from a lighthouse that has no bulb.

Someone has stolen an eighty-one-year-old silver trophy in front of four hundred people.

And those are only the first three mysteries.

You will work through six separate cases, each built around a sequence of logic puzzles. Every puzzle asks you to work out who was where and when, using clues, deductions and the Story-Doku grid.

No guessing. No random trial and error. Just clues, logic and detective work.

What’s inside

• 2 Training Puzzles to learn the Story-Doku method
• 25 Mystery Puzzles for Young Detectives
• 6 separate mystery cases
• 1 final Master Case
• Complete answer grids
• Step-by-step explanations showing how each puzzle comes apart
• A final Junior Detective Certificate

The difficulty builds gradually, so the training puzzles teach the method before the mysteries become more challenging.

The six cases

• Case 1 — The Mystery of the Missing Moonstone · Puzzles 1–4
• Case 2 — The Secret of the Old Lighthouse · Puzzles 5–8
• Case 3 — The Vanishing Championship Trophy · Puzzles 9–12
• Case 4 — The Midnight Train Mystery · Puzzles 13–16
• Case 5 — The Hidden Castle Room · Puzzles 17–20
• Case 6 — The Lost Explorer’s Journal · Puzzles 21–24
• Master Case — The Impossible Museum Heist · Puzzle 25

The Master Case brings the detective’s skills together for the final investigation.

Why Story-Doku?

Story-Doku combines a story-driven mystery with a structured logic grid. Children learn to:

• read and interpret clues
• eliminate what cannot be true
• spot what must be true
• use timing and order clues
• connect deductions across a grid
• work systematically instead of guessing
• prove an answer rather than simply choosing one

The story gives every puzzle a reason to matter.

For ages 9–12

Designed for young detectives approximately ages 9–12. The book begins with guided training and gradually introduces more demanding logic while keeping the core solving method consistent.

Digital format

• Digital PDF
• 161 pages
• A4 format
• Print at home or read digitally on a tablet or computer
• You will need a pencil and a rubber for solving the grids
• Nothing is physically shipped
• Instant digital delivery after successful payment
• Download link is also provided by email

Answers & explanations

The answer section begins on page 112. Every puzzle has a completed grid followed by a “How it comes apart” walkthrough.

The explanations show the actual logical route rather than simply giving the final answer. Children should try the puzzle first and use the answer section as a second opinion when they are genuinely stuck.

The final reward

After completing the mysteries, young detectives reach the final Master Case and can finish with their Junior Detective Certificate on page 161.

Personalised copy

Every purchased copy is individually personalised. The generated PDF includes a personalised footer on applicable interior pages containing:

Personal Copy · [BUYER NAME] · [PERSONAL COPY ID]

The Personal Copy ID is unique to that customer’s copy. The personalisation does not change the book’s content, puzzle logic, page count or dimensions.

This is a digital product. Nothing physical will be shipped. The PDF is licensed for personal, non-commercial use only.

Please do not:

• Share the PDF with anybody else.
• Upload it to a website, cloud drive or social media.
• Resell, redistribute or give away the file.
• Sell printed copies of the book.
• Copy or reproduce any part of it for commercial use.