Isaac - Profile of the son of Abraham from a joint Lutheran and Catholic bible study project. - http://www.aboutbibleprophecy.com/p20.htm
The Blessings of Isaac - A Jewish reinterpretation of the patriarch's intentions toward his sons. - http://www.mesora.org/isaaacsblessings.html
Isaac and His Sons - Jewish commentary on the true significance of the patriarch's deception by his less-favored son. - http://www.aish.com/literacy/jewishhistory/Crash_Course_in_Jewish_History_Part_6_Isaac_and_His_Sons.asp
Jewish Encyclopedia: Isaac - Overview of the patriarch from the traditional Jewish perspective, including apocrypha and Talmudic commentary. - http://www.jewishencyclopedia.com/view.jsp?artid=174&letter=I
Catholic Encyclopedia: Isaac - Commentary on the Biblical patriarch from the traditional Catholic perspective. - http://www.newadvent.org/cathen/08175a.htm