What is your policy when it comes to new authors? Do you feel comfortable purchasing a book or do you prefer to borrow new authors from the library? How often do you 'try out' a new author?
If at all possible, I like to check out a book from the library before purchasing my own copy. I will relax this rule if the author is recommended by a source I trust, usually another author or reviewer that I like. For nonfiction books, I will also purchase books without previewing them as library books if I have heard or seen the author give a lecture that I enjoyed. For example, I bought Niall Ferguson's books the The World At War and The Ascent of Money based on some of his lectures I viewed.