kind of, it’s more like it starts a geralt’s story, but becomes ciri’s story. the first two books are all geralt. after that it’s about geralt and ciri’s relationship. then by the last book we barely even see geralt.

then after the series was finished he started writing more little stories from earlier in geralt’s life.

as i said in another comment. it’s downright bizarre that ciri doesn’t get mentioned until the third game. she almost makes more sense as the protag anyway.