Indiana Jones Chronicles" explains how Indiana becomes solitary and less idealistic following his service in World War I. In "Indiana Jones and the Kingdom of the Crystal Skull", Jones is older and wiser, whereas his sidekicks Mutt and Mac are youthfully arrogant and greedy, respectively. Indiana Jones is modeled after the strong-jawed heroes of the matinée serials and pulp magazines that George Lucas and Steven Spielberg enjoyed in their childhoods (such as the Republic Pictures serials, and the Doc Savage series). Sir H. Rider Haggard's safari guide/big game hunter Allan Quatermain of "King Solomon's Mines", who dates back to 1885, is a
Indiana Jones Solo's skeleton and the realization that a rumored nearby Sasquatch is in fact Chewbacca. Indy also appears in a series of Marvel Comics. The four Indiana Jones film scripts were novelized and published in the time-frame of the films' initial releases. "Raiders of the Lost Ark" was novelized by Campbell Black based on the script by Lawrence Kasdan that was based on the story by George Lucas and Philip Kaufman and published in April 1981 by Ballantine Books; "Indiana Jones and the Temple of Doom" was novelized by James Kahn and based on the script by Willard Huyck & Gloria