SuperSearch is a great way to find book reviews! You can search for a specific book or an author in the search, then select "reviews" from the source types list to filter the results.
When you know the name of a book or article, you can trace citations forward to find newer scholarship that cites that source.
You can also search within the "Cited by" results to find sources that mention a particular work or other keyword. Just click on "Cited by," enter a term or phrase in the search box, and check the "Search within citing articles" box before running your search.
Try searching SuperSearch for non-peer reviewed commentaries of a scholar's life, work, controversies, and contributions.
Type in the theorist's name and filter for newspapers and magazines in the results.