Book : Professional ASP.NET Design Patterns By Scott Millett

http://www.wrox.com/WileyCDA/WroxTitle/Professional-ASP-NET-Design-Patterns.productCd-0470292784.html

http://www.amazon.com/Professional-ASP-NET-Design-Patterns-Millett/dp/0470292784/ref=sr_1_1?ie=UTF8&qid=1301465392&sr=8-1