Mystery in the Desert is a comic from the March/April 2013 issue of the official magazine.
Finn McMissile has come to Radiator Springs for a vacation with Holley, but she has mysteriously disappeared. He takes Mater with him (much to Mater's confusion) and they continue through the desert. Holley and the rest of their friends shock Finn with a surprise birthday party, and Finn finally begins to restfully enjoy his trip.
- It is revealed Finn's birthday is in either March or April.