COREX BOOKS

CASE FILE № J·2026

— A 60-SECOND DETECTIVE ASSESSMENT

43,000 suspects. 17 clues.

Could you find the killer?

June has been arrested for a murder she didn't commit — her trial starts tomorrow. Answer 6 quick questions and we'll tell you what kind of detective you are, and whether this case is a match for you.

START THE ASSESSMENT

No email needed to see your result

COREX BOOKS

CASE FILE № J·2026

— YOU'RE IN GOOD COMPANY

Most of our detectives said exactly the same thing.

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Bought it because I was sick of scrolling my phone every night and honestly it worked. It kind of turns the chaos in your brain off? You just sit there with a pen crossing off names and it's weirdly relaxing.

— Carol J., verified reader

CONTINUE

COREX BOOKS

CASE FILE № J·2026

QUESTION 03 / 06

Working the case — alone or with a partner?

🕵️

Solo — just me, the ledger, and a highlighter

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With my partner, friend, or mum — comparing notes

🏠

As a family or group thing

COREX BOOKS

CASE FILE № J·2026

— THE CASE SO FAR

Every clue you need is printed in the book. Exactly one name survives.

43,000

SUSPECTS

17

CLUES

1

ANSWER

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Warning! Addictive. I sat down 'for five minutes' and lost two hours. So satisfying when a clue clicks and you get to cross off a whole chunk of names.

— Isabella T., verified reader

CONTINUE

COREX BOOKS

CASE FILE № J·2026

— PRAGUE CRIMINAL DIVISION

Building your detective profile…

Reviewing your answers

■ FILED

Matching against solver profiles

■ MATCHED

Checking case difficulty fit

■ CONFIRMED

Stamping your case file

■ APPROVED

Finalizing your case file…

ASSESSMENT COMPLETE

The most common profile among our readers

DETECTIVE PROFILE

The Escape Artist

You don't need another app — you need the opposite of one. You want your hands and mind busy with something real, where two hours disappear into progress you can see instead of a feed you can't remember.

Case match:

96%

— The Killer Isn't June

That's exactly what the ledger is for: a pen, 43,000 names, and the strange calm of crossing them off one deduction at a time. Readers call it 'weirdly relaxing' — right up until a clue lands and suddenly it's 11pm.

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Worried it's too hard? Every clue is designed to be solvable, with gentle hints available online.

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Worried it's over too fast? Most solvers take 3+ sittings over days.

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Seen something like it on TikTok? This case was built from scratch by Charlotte Brooke with exactly one provable answer.

The Killer Isn't June

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