Think of a book review in much the same way as you think of a movie review. Reviews typically offer an opinion of a book’s quality or value rather than an in-depth analysis of the work, and tend to be shorter than literary criticism.
Here's how to search Nexis Uni for reviews. You can open this image in a separate tab or window to view larger.

This is how you search for reviews in Academic Search Complete. I would select both book reviews and poetry reviews from the drop down. The database relies on many publications to label their sources and you can't be sure of consistency.
