The Lost Journal of Indiana Jones is a reference book released on May 1, 2008 to coincide with the theatrical release of Indiana Jones and the Kingdom of the Crystal Skull. The book is written from an in-universe perspective and presented as Indiana Jones' journal (most prominently seen in The Young Indiana Jones Chronicles) covering the years from when he received the book from his father in 1908 up until the book's theft by Soviets in 1957. It references several sources from the franchise, including the four movies, television series and elements from the rest of the Expanded Adventures.