Gary Paulsen

The Legend of Red Horse Cavern is the first novel in the World of Adventure series by Gary Paulsen. It was first published on September 1, 1994 by Yearling.

The Rock Jockeys is the fourth novel in the World of Adventure series by Gary Paulsen. It was published on March 1, 1995 by Random House. It was later retitled Devil's Wall by Macmillan Children's Books in the UK and released on April 9, 1999.

The Seventh Crystal is the twelfth novel in World of Adventure series by Gary Paulsen. It was published on July 1, 1996 by Random House.