Many of the major art databases index book (and exhibition) reviews, namely Art & Architecture Source, Bibliography of the History of Art / International Bibliography of Art, Avery Index to Architectural Periodicals, and ArtBibliographies Modern. CAA Reviews, an online-only publication of the College Art Association, includes reviews of art and architecture monographs, exhibitions, essays, and lists dissertations by year, all organized by subject and time period. The Art Libraries Society of North America publishes its art book reviews online: ARLIS/NA Reviews, plus see Recommended Blogs for Art Reviews (2008). ARLIS/NA's Multimedia & Technology Reviews reviews websites, online publications, and other products and resources of use to researchers but aren't packaged in traditional ways. Also, Bookforum reviews a good number of art books, with some reviews available at its website.
One can also search Articles+, do a search, entering as many keywords as you'd like contained in the book title in question, and select Book Review under Content Type on the left-hand side.
For canonical art historical titles, The Burlington Magazine has published a series of articles on important 20th-century texts in art history called Art History Reviewed. Just do a title search for Art History Reviewed in Art Index and you will see a listing of the specific articles and books reviewed. Burlington is available online in JSTOR, minus the last half a dozen or so years. Print issues are available in Marquand. Entries in this series have been compiled in The Books that Shaped Art History (Thames & Hudson, 2013), available in Marquand at N7480 .B66 2013.