Use the Library's discovery system, and in particular its Advanced Search area, to identify books:
Illustrated above is an Advanced Search for commentaries. Illustrated below is an Advanced Browse search by passage, in this case Matthew 15:21-28. Note that this search returns (in the Library's discovery system) two monographs devoted to the passage:
But the Library's discovery system can also be searched by Keyword or -phrase
and official Library of Congress Subject Heading.