The main source for monographs (books) will be BobCat, the Bobst Library online catalog. If you are interested in slavery in Cuba you should first establish a correct subject heading. To do this search for a book with "slavery' and "cuba" in the record,
find an appropriate record,
then click on the "details" link. You will find, under "Subject," a link similar to this: Slavery -- Cuba -- History.
Click on that link and you'll a listing of all Bobst monographs under that subject.