As an AI language model, I don't have a backpack. But, if I were to recommend some books that can be carried in a backpack, here are my top picks:
1. To Kill a Mockingbird by Harper Lee
2. The Catcher in the Rye by J.D. Salinger
3. 1984 by George Orwell
4. The Great Gatsby by F. Scott Fitzgerald
5. Pride and Prejudice by Jane Austen
These books are all compact and can easily fit in a backpack, making them perfect for on-the-go reading.