The Aviator, Ernest K. Gann, 1981 first edition, very good condition of book and dust jacket.
 
Description -
The Rocky Mountains, in the year 1928:  It is the pioneering days of the U.S. airmail service.  A downed pilot and his only passenger, a girl brave and wonderously perceptive beyond her eleven years, struggle to survive, their fear giving way to a bond of caring, great enough to surmount the most terrible odds...