Search for the author's name and key words from the title, then limit your results to the Content Type "Book Review" (on the lefthand side of the page)
Both American Historical Review and Isis publish hundreds of book reviews every year. If you are looking for a review of a recent book from an academic press, you may find it quickest to search them directly. There are also several online review services, including H-NET, Bryn Mawr Classical Review, and The Medieval Review. It's worth signing up for whichever of these covers your area of interest.