I won't pay more than $15 for a book that has less than 100 pages in it.
I rarely read books in business, politics, science and current events that were published more than three years ago. I like to read recently published books to stay on the cutting edge of knowledge and best practices.
I don't buy a book just because Oprah recommends it.
I rarely read fiction authored by women writers. I will gladly read non-fiction books by women authors.
I rarely read books "authored" by politicians and celebrities as most of them are dull and not really written by them anyway.