Ten Bullets to Tombstone was a western written by Sam Magee, Indiana Jones' favorite author of the genre.
In the book, a man Jeb heeded an old gunslinger's advice to drop to the ground when being shot at which allowed him to kill Black Bart, making him catch "the first train to Boot Hill".
In 1913, Jones took Ten Bullets to Tombstone with him on a visit to the Russian Empire and the gunslinger's advice helped Jones and his friend, Tamar Rustava, avoid being shot.
Behind the scenes[]
Jeb is unnamed in Young Indiana Jones and the Princess of Peril but given an identity and expanded upon in the comic adaptation.
The old gunslinger's words to Jeb are slightly different between the two media. In the novel the line is "bite the dirt, boy", while in the comic it's "eat the dirt".
The use of Boot Hill and Tombstone would suggest the story is set around Tombstone, Arizona where the Boothill Graveyard is located.