The assessment area of WikiProject Books focuses on assessing the quality of articles within the WikiProject's scope. The resulting article ratings are used to aid in recognizing excellent contributions and identifying topics in need of further work, and are also expected to play a role in the Version 1.0 Editorial Team program.
The ratings are done via inserting information into the {{WPBooks}} project banner, which causes the articles to be placed in the appropriate sub-categories of Category:Book articles by quality.