Having your book reviewed is an often overlooked aspect of the book publishing business, but reviews can undoubtedly help sell books. Collecting reviews from major publications can be extremely difficult without the backing of a well-known publisher, so it might be best to start small. For instance, consider starting with Amazon.
If you sell on Amazon, you should take advantage of their well-known review system. Who should review your book? Anyone you know and respect. As Tim Grahl points out, soliciting reviews does not violate Amazon's Customer Review Creation Guidelines, so ask away. It's courteous to ask before sending advance review copies (ARC) to reviewers, and if they do agree to publish a review of your book, sending a note of thanks is also a good idea.
Of course, Amazon isn't the only place where reviews matter. Johnson and Wisler suggest joining the Independent Book Publishers Association to help build a network of other potential reviewers. The IBPA can also help secure reviews from the Midwest Book Review and Foreword Reviews. For other ideas for finding reviewers, check out Joel Friedlander's guest post at Writer's Digest.
Grahl, Tim. "How to Launch Your Book with at Least 25+ Amazon Reviews." Tim Grahl. Accessed April 27, 2016. http://timgrahl.com/amazon-reviews.
Johnson, Shelli, and Alice Wisler. "How to Get Major Publications to Review Your Book: 10 Invaluable Tips You’ll Wish You Had Yesterday." Novel Publicity. Last modified January 2012. http://www.novelpublicity.com/2012/01/how-to-get-major-publications-to-….