You may want to try a search of the library catalog using the Library Of Congress Subject Headings listed below:
Books that are not available in the Lehman library can be requested from another CUNY school. This service is called CLICS (CUNY Libraries Inter Campus Service). The video below will explain how to use it to have books sent to this library for you to pick up.
Graduate students and faculty may use CUNY's Interlibrary Loan (ILL) service called ILLiad.