The sources of Islamic Law are the Qur'an and the Sunnah (the traditions of the Prophet). Most of these texts have been digitized in various translations and are available on the web.
Listed within this page and its subpages, are works in the collection on various aspects of classical Islamic law. If you are interested in a title, just search it or the author in Hollis.
Bibliographies - Islamic Law
Bibliographies on Islam and the Middle East
Each of these bibliographies contain a section on Law.