Warriors #2: Fire and Ice by Erin Hunter (2003, Hardcover)

This novel captures the feeling of a summer that lasts forever.

Warriors #6: The Darkest Hour; Warriors: – 9780062367013, paperback, Erin Hunter

The illustrated diary entries give a personal glimpse into history.

Warriors #3: Forest of Secrets Hardcover Erin Hunter

This travel guide is illustrated with local artwork from each region.

Rising Storm; Warriors, Book 4 – 9780060525637, paperback, Erin Hunter

This activity book includes a code-breaking section for secret messages.