Book Trailers: Do they sell more books?

There’s been a lot of discussion about book trailers on this blog and elsewhere on the ‘Net, and the question is: Do book trailers sell books?

As an author who has no access to knowing where book buyers come from or whether they bought because of a trailer, I am very interested in the answer to this question...

To read my article on book trailers, please visit Books on the Brain.

~Cheryl Kaye Tardif, suspense author