THE LONE STAR RANGER BY ZANE GREY, VG ( some edge wear) early Grosset edition from 1920 per the ZG ad page which begins with Man of The Forest from 1920.  This book may be a 2nd Grosset printing, but it has no code letters within.  The Harper 1st edition was published in 1915; the 1st Grosset was published in 1916 per the ZGWS. 

Good original DUST JACKET IN MYLAR has some archive tape on the verso, and obvious edge wear.   The eBay synopsis above is included for your reference, but the listed details are for a newer and later version of this book.

A story of Texas in the period of the Seventies. After killing a man in self-defense, Buck Duane becomes an outlaw, a companion of the gunfighters and rustlers who live along the Texas border. In a camp on the Mexican side of the river, he finds a young girl held prisoner, and in attempting to rescue her, brings down upon himself the wrath of her captors and henceforth is forced to live a lonely life--hunted on one side by honest men, on the other by outlaws.

*There is a movie poster set in the my store for the 1942 20th Century-Fox film of the same name LONE STAR RANGER.