The first puzzle book from bestselling author Janice Hallett, featuring a new A Box Full of Murders mystery. Perfect for fans of Murdle Jnr and Cluedle.

The world’s most famous puzzle setter has been MURDERED!
Their successor has been KIDNAPPED.
A CRIMINAL PLOT is underway.

Super sleuth siblings Ava and Luke are on the case, but this time they need YOUR help. From mazes and crosswords to code cracking, sudokus and ciphers, work through the puzzles and put your detective skills to the ultimate test!

YOU know the facts. YOU have all the clues. Can YOU solve the puzzles and stop the criminals in their tracks, before it’s too late?

Based on the bestselling children's mystery series from Janice Hallett and featuring 100+ puzzles, this is the perfect activity book for budding detectives aged 8-12.

About the Author

Heralded as 'Agatha Christie for the 21st Century', Janice Hallett's adult murder mystery novels with an epistolary twist have sold over half a million copies through TCM to date and been sold into 17 languages. Her debut book, THE APPEAL, was named Sunday Times Crime Book of the Year and awarded the CWA Debut Dagger. Her four adult follow-up novels have also all been Sunday Times Bestsellers. Her debut children's novel, A BOX FULL OF MURDERS, was the bestselling children's mystery of 2025 and shortlisted for the Books Are My Bag Reader Awards.