The Home Winemakers Manual Online (free and full of great information)

Recommended Books at Amazon and Barnes & Noble

Techniques In Home Winemaking  by Daniel Pambianchi

Winery Technology and Operations: A Handbook for Small Wineries by Yair Margalit

Winemaking: From Grape Growing to Marketplace  by Richard Vine, E. M. Harkness, Sally J. Linton

The Vintner's Art : How Great Wines Are Made