Our guidelines say to select the book's genre from our list and if the genre you need does not appear, then PLEASE contact us before submitting your book. We want to make sure we'll have a reviewer capable of reviewing that book and giving it the attention it deserves. But again, time after time, we get submissions with the genre listed as "other."
It really is simple - read the guidelines for each review site and then follow them! Your book will get reviewed quicker and you'll keep the reviewers happy.