This friendly review site for print-on-demand books began as a blog featuring iUniverse titles. It has expanded to include other publishers.
Floyd Orr runs a great site. To handle more books, he has recently taken on some contributing reviewers. I just completed my second review for him. The reviews on this site tend to be about 500 to 600 words, so there's space enough for your book to get a fair amount of play.
If you are looking for a review of your POD book, this is a site to check. See the site for requesting-a-review guidelines. Reviews are also posted on amazon and elsewhere by the reviewers.
(No, he didn't change his URL to reflect the fact he covers more than iUniverse books!)