Damn, this girl is moving fast!
(Also: how the hell do you recommend the book you don't like, or more specifically why not just to recommend the books you like? I do what all the time)
I had to juggle this a little in my mind, but I think I got it. What she was saying was that before, it was people asking her, based on her wealth of knowledge, to recommend them a book that
they would like. That could be a book that she also likes, yes, but it's not exactly a guarantee that a book she likes the other person would like also.
Because Ichinose is looking to learn more about Yukishiro, that's why he specifically asked about her own likes.