Sefer ha-Halachot extracts all the pertinent legal decisions from the three Talmudic orders Moed, Nashim and Nezikin as well as the tractates of "Berachot" and "Chulin" - 24 tractates in all. Alfasi transcribed the Talmud's halakhic conclusions verbatim, without the surrounding deliberations; he also excludes all Aggadic (non-legal, homiletic) matter as well as discussion of the halakha practicable only in Land of Israel. Wikipedia
After their death, Alfasi took their place in the estimation of his contemporaries, and was regarded as the chief expounder of the Talmud. www.jewishencyclopedia.com/view.jsp?artid=1191&letter=A
Cyber encyclopedia of Jewish history and culture that covers everything from anti-Semitism to Zionism. It includes a glossary, bibliography of web sites and books, biographies, articles, original documents and much more! www.jewishvirtuallibrary.org/jsource/biography/Alfasi.html
The definitive Wikipedia entry for Isaac Alfasi. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Isaac_Alfasi