I don't believe therapists are so delicate they are unable to handle a client refusing books foisted upon them. Even if I treasure a book - I am not hurt if someone else doesn't like it or want to read it. I don't think you need to protect a therapist from you not liking something and I think lying to the therapist in order not to hurt their feelings (and really you don't know if this sort of preference would hurt their feelings to begin with) is not how therapy is supposed to go. Do you really think the therapist wants you to placate her like this?