Do you have what it takes to solve 100 dastardly puzzles set across the globe in a race-against-time to uncover the secretest secret of secrets? Summon your inner Dan Brown to catch the culprit and save the world.

Renowned theologist Sir Gordon Gladstone has been brutally murdered at the British Museum, mere moments before revealing 'the secretest secret of secrets'. After the Library of Alexandria was destroyed, its most sensitive document with this all-important secret was moved to a hidden location in Egypt – namely, inside the Sphinx. Just one problem: it's no longer there!

Put your Dan Brown hat on and retrace the footsteps of legendary puzzle solvers Professor Lawrence Lightwood (a cryptographer) and Doctor Dolores Delgado (a literary historian) to find the murderer, retrieve the secretest document, and prove yourself as a puzzle master of the highest order.

Join Lightwood and Delgado on a puzzle-strewn chase around the world, with crosswords, sudoku, word searches, mazes, codes, logic puzzles and much, much more. Your quest will take you to ancient sites and great cities, but watch out, because a shadowy group known as S.C.O.W.L (The Secret Circle of Whispering Librarians) is searching for the secret and wants to keep you quiet … dead quiet.

Featuring a wide variety of 100 fiendish and humorous puzzles ranging in difficulty, readers will have the option of following the story through from start to finish (with a tough bonus puzzles for those who have collected clues along the way) but each puzzle will also provide context for those who just fancy a quick fix. The Secretest Secret of Secrets is perfect for armchair detectives and adventurers who have what it takes to catch the culprit.