All books owned by libraries in the tri-co can be accessed through Tripod. (that link is for Haverford students, if you are a BMC or SC student, please use the link for your school).
To find books that are relevant to your research topic, you can begin by developing search terms that speak to your particular interests.
Once you've identified a relevant book, you can find more like it by looking at the virtual browse feature at the bottom of the catalog entry.
If you are interested in a book not owned by the Tri-College Libraries, you should first turn to E-ZBorrow, which gives you access to book collections at a number of local colleges and universities. It usually takes about three days for E-Z Borrow books to arrive.
Books not available through E-Z borrow can be obtained through Interlibrary Loan (ILL), and will arrive, once you submit the form, in as little as four to five days.
To get bibliographic information on books not owned by the Tri-College Libraries, you can turn to WorldCat. This is a combined library catalog containing more than 179 million records describing items owned by libraries around the world. Many of these titles are available to you though interlibrary loan.