His site delivers links to English and American literature criticism on the Internet. The names indexed are those of authors. The information provided by clicking on an author's name is pretty good. Some links were out of date when I checked, but it was still worth checking. You have to fill out a registration form to use this page, but that's OK because the page is free and The Times is not going to get you into trouble.
Book reviews are one of the best sources of critical information about books.
This site has plenty of book reviews which you can search by author or title. Every junior needs a pal like this one to help with that American author theme. In this case, your pal is Dr. Paul P. Reuben, professor and library coordinator in the department of English at California State University Stanislaus. He has done a fine job of finding great sources for you. A search engine that specializes in finding literary criticism.