I have actually found that the opposite is true and that it is the books on which video games are based that are worth reading. Anyone who has played The Witcher games will agree with me that they are some of the best of the modern era, but did you know that they are actually based on the books of a Polish author named Andrzej Sapkowski? Read The Last Wish, Blood of Elves, Time of Contempt, Baptism of Fire, The Tower of Swallows, Lady of the Lake, and Season of Storms if you couldn't get enough of the adventures of Geralt of Rivia in the games. Fans of the Assassin's Creed games might also be surprised to hear that the series drew inspiration from a 1938 novel called Alamut that was written by Vladimir Bartol. There are a lot of other obvious ones as well, such as the Frank Herbert books that inspired the Dune games, the Discworld novels that were turned into point and click adventure games, as well as the games based on books by J. R. R. Tolkien, George R. R. Martin etc.