. . . is that you sometimes receive e-mails from publishers and authors saying would you like some books to review. As I did today. The person who e-mailed me had gone through my wish list as well and fortunately several of that publisher's books were on it. So a good reason for maintaining a wish list as well.
I did turn down an offer a week or so ago because the book offered just didn't look like my sort of thing but generally what I have been offered so far fits my tastes. It's beginning to look as though my writing in future is going to consist of book reviews but as I enjoy doing them and I enjoy reading the books this is no hardship.