What This Book Is About
Kyle Keeley is the class clown who has never taken anything seriously in his life, especially not the library. But when eccentric billionaire Luigi Lemoncello builds the most extraordinary library the world has ever seen right in Kyle's hometown, Kyle is one of twelve kids selected for an exclusive overnight lock-in. The catch? They have to figure out how to escape using nothing but the clues hidden within the library's collection. It sounds like a game, because it is one, designed by the world's greatest gamemaker himself.
What starts as a fun competition quickly becomes a brain-twisting adventure packed with riddles, codes, literary references, and high-tech surprises. Every book on the shelf, every display, every holographic exhibit hides a clue. Kyle discovers that the same skills he uses to goof around and think on his feet are exactly what he needs to crack Mr. Lemoncello's puzzles. A New York Times bestseller for over 100 weeks, this novel turns the library into the most exciting place on Earth and proves that reading is the ultimate superpower.
Available at Popular bookstores, Kinokuniya, and the Singapore National Library.
Why UWC Chose This Book
This book is a masterclass in making reading feel like an adventure. UWC values inquiry-based learning, and Mr. Lemoncello's Library is essentially an inquiry-based challenge turned into a story. Students see characters using research skills, cross-referencing sources, and thinking creatively to solve problems, the exact skills international school curricula aim to build.
For students in Singapore who are preparing for the rich literacy demands of upper primary, this book normalizes the idea that libraries and books are exciting, not boring. It also models teamwork, fair play, and the value of diverse thinking styles. Kyle, the class clown, succeeds not despite his unconventional approach but because of it, a message that resonates with students who learn differently.
Reading Level Guide
Too challenging at A1. The puzzles and literary references require solid reading comprehension. Start with simpler mystery books first.
Right in the sweet spot. The fast-paced plot and game-like structure keep A2-B1 readers hooked.
A quick, fun read at B2. Great for reluctant readers. Try the sequel, Mr. Lemoncello's Library Olympics, next.
Other UWC Recommended Books for This Grade
Not sure if this book is right for your child? Take our free English assessment to find their CEFR level, then choose books that match.






