Here are two free sites where you can find independent (free) book reviewers OR you can sign up yourself to be a book reviewer. Reviewing books of the same genre as yours on your blog is a good way to attract interest to your blog and therefore to your own books. Post your reviews on Amazon - be sure your Amazon profile mentions the complete url of your blog (make it a live link) and the titles of your books so if anyone clicks on your review signature they will see your work. Goodreads is another networking place to post your reviews.

How to find reviewers for self-published books