To find works dedicated to research on an author, do a subject search on the author's name, last name first.
A keyword search on the author's name will find these works, plus works by the author, and sections of more general works.
To find a specific work, search by title. Note: sometimes we have the collected works on an author, but the individual titles are not listed. To find works by an author, do an author search, last name first.
Online text collections deliver more detailed results than the library catalogs.