Comparisons are Necessary in Order to Build Your Audience

It’s nice to get a review which offers comparisons to your book so those reading the review can get a clearer picture of your plot. i.e. “A great read for anyone who enjoys extensively built worlds, philosophical questions, and an ol' fashioned A.I uprising. Reminiscent of I-Robot and Do Androids Dream of Sheep, I really liked the core premise of the plot and the irony of the outcomes.”
If they’d read and enjoyed one of the books being compared to yours, then they know there is a good ch...