Recently, I had a book trailer designed by Hayes Design and Editorial Service, http://hayesdesign.weebly.com
. I put it on Google and YouTube. I saw about 213 more sales that following week than what I'd been getting.
When I plugged my trailers into my umpteen nings, I saw an immediate jump, 394 books in one week. However, I cannot say for sure it is the trailers for all of the increase because I have so many promotions going on. I'd be interested to know more about your experiences. Did book trailers boost your sales?