"Good Dog, Carl" by Alexandra Day is a children's picture book published by Simon & Schuster Books for Young Readers in 2010. The book, with 40 pages, follows the story of a little girl and her loyal dog, Carl, as they embark on various adventures. Illustrated by the author herself, the book is written in English and falls under the genre of juvenile fiction. With a focus on themes of friendship, loyalty, and adventure, "Good Dog, Carl" is a delightful read for young readers and dog lovers alike.