Who Stole Rex?: An Interactive Detective Mystery Puzzle for Kids with 10,000 Suspects, 18 Clues, Secret Codes, and One Answer Hidden in Plain Sight (Paperback) (ISBN-13: 9781957515694)

Rex is gone.

The Natural History Museum's prized Tyrannosaurus rex skull was supposed to be the centerpiece of its brand-new fossil wing and the star of the upcoming grand opening.

But on the night before the museum's biggest event of the year, Rex disappears from a secured gallery. No broken glass. No forced entry. No alarm. All that is left behind is a tool pouch, a torn scrap of lab coat sleeve, and a handwritten note that reads:

"Don't worry. I'll keep him safe."

By morning, investigators have gathered every record connected to the opening, including curators, guards, technicians, employees, volunteers, and every visitor who passed through the museum that week.

The result is a case file containing 10,005 suspects. Somewhere inside it is the person who took Rex. And you are the only one who can find them.

WHO STOLE REX? is a detective puzzle book for kids that combines a museum mystery, coded clues, logic puzzles, brain teasers, and a massive elimination challenge into one unforgettable investigation.

Young detectives must study the evidence, eliminate every impossible suspect, and uncover the one person who fits the entire case.

Inside this challenging mystery puzzle book, young investigators will discover:

- A massive suspect pool that must be narrowed down one clue at a time.

- 18 carefully constructed clues involving logic, letter patterns, name positions, numbers, and deduction.

- Two encrypted Caesar cipher clues that must be decoded before they can be used.

- Security credentials, visitor records, and after-hours keycard logs that rule out entire suspect groups at once.

- A convincing decoy suspect who matches 17 of the 18 clues and could easily fool anyone who rushes the investigation.

- One guaranteed solution, with exactly one suspect remaining when every clue is applied correctly.

- A surprising final twist that changes how readers see the entire case.

This is not a mystery where readers simply guess who did it.

Every clue matters. Every elimination can be checked. The answer can only be reached through careful observation, critical thinking, and pure logic.

Perfect for young detectives, mystery fans, puzzle-loving kids, and curious problem-solvers who enjoy whodunits, secret codes, escape-room-style challenges, brain games, and interactive logic puzzles.

This screen-free activity for tweens and middle-school readers strengthens focus, pattern recognition, problem-solving, and critical-thinking skills without feeling like homework. It also makes an exciting birthday, Christmas, holiday, or travel gift for boys and girls ages 10-14.

The museum doors open soon.

Can your young detective follow all 18 clues and uncover the person hiding in plain sight?

Add WHO STOLE REX? to your cart today and see whether they can solve the case before the grand opening begins.

Author: J. T. Parker,Riddleland
ISBN-10: 1957515694
ISBN-13: 9781957515694
Publisher: Bcbm Holdings
Language: English
Published: 07/17/2026
Pages: 138
Format: Paperback
Weight: 0.43lbs
Size: 9.00h x 6.00w x 0.30d