what impact did the books have on fantasy genre?
The genre flowered throughout the 1960s and enjoys popularity to the present day.
The Lord of the Rings
 Largely thanks to "The Lord of the Rings," the genre flowered throughout the 1960s and enjoys popularity to the present day. 
what book comes first in lord of the rings The Fellowship of the Ring" how many books are there in total? Three who wrote them? J. R. R. Tolkien
wiki:19676186
The Lord of the Rings [SEP] Influence on fantasy
The enormous popularity of Tolkien's work expanded the demand for fantasy. Largely thanks to "The Lord of the Rings," the genre flowered throughout the 1960s and enjoys popularity to the present day. The opus has spawned many imitations, such as "The Sword of Shannara", which Lin Carter called "the single most cold-blooded, complete rip-off of another book that I have ever read". "The Legend of Zelda", which popularized the action-adventure game genre in the 1980s, was inspired by "The Lord of the Rings" among other fantasy books. "Dungeons & Dragons", which popularized the role-playing game genre in the 1970s, features several races from "The Lord of the Rings," including halflings (hobbits), elves, dwarves, half-elves, orcs, and dragons.