Penny Power is a well known author who describes in her book what social networking means for you and your business. 

I am a member of ecademy.com and saw her book advertised on the ecademy website. 

Thomas and Penny Power set up ecademy in 1998 and through their sacrifices  and efforts, ecademy has become one of the best web sites for business people to connect across the world and help them to connect support and adapt to a changing world. 

If you are serious about online business in 2010 and beyond this is a "must read book". 

The book is published by Headline Publishing Group of london , England and has ISBN 978 07553 1951 0.