"Lyle the Crocodile" is a children's book series created by Bernard Waber. The stories follow Lyle, a friendly crocodile who lives in a house in New York City with the Primm family. Lyle is known for his kind nature and love for adventure, often finding himself in amusing situations. The series highlights themes of friendship, acceptance, and the importance of being true to oneself. Lyle's charming personality helps him connect with the other characters, including his neighbor, Mr. Grumps, who initially dislikes him. The books have been beloved by children and parents alike for their engaging illustrations and heartwarming stories.