9 books in series

Indiana Jones: Find Your Fate

Indiana Jones: Find Your Fate is a 9-book series with 9 released primary works first released in 1984 with contributions by R.L. Stine, Rose Estes, Andy Helfer, Richard Wenk, Megan Stine, Henry William Stine, and Ellen Weiss.

Indiana Jones and the Curse of Horror Island
Indiana Jones and the Lost Treasure of Sheba
Indiana Jones and the Giants of the Silver Tower
Indiana Jones and the Cup of the Vampire
Indiana Jones and the Legion of Death
Indiana Jones and the Cult of the Mummy's Crypt
Indiana Jones and the Dragon of Vengeance
Indiana Jones and the Gold of Genghis Khan
Indiana Jones and the Mask of the Elephant