I have a book review in the latest edition of Brevity. For those unfamiliar, Brevity is an online lit mag dedicated to "concise nonfiction," meaning less than 750 words. "Over the past year Brevity has averaged 6,000 visitors per month, or 24,000 visitors per issue," (from the website). And it's free!
So get with it. Here's a link to my favorite from this issue.