My my reckoning, Zane Gray wrote 72 novels. Most were western, a couple on baseball. The first, Betty Zane, in 1903. Fifty-seven were published before his death in 1939, and fifteen postumously from manuscripts (one of these, "Reef Girl," was not a western). Four more books were in the "King of the Royal Mounted" set. He wrote about ten non-fiction books on fishing (some of these are also considered classic). With H. C. Wetmore, he wrote a biography of Buffalo Bill ("Last of the Great Scouts"). He also wrote the story of Boulder Dam.

Lots of reading ahead of you.