This book for middle grade readers recreates the story of the blockbuster film Night At the Museum. A security guard at the museum, Larry Daly, has settled into his role as caretaker of the museum's magical inhabitants, but he's about to face his biggest challenge yet as he and his friends discover that the mysterious source that brings them to life is fading. It's up to Larry to figure out how and why his friends exist before it's too late! Includes 8 page full color insert with photographs from the movie.