On the book : The tone is a lot more like a 'Management Book' than the (very engaging) blog and videos. If you'd like to dig out the content yourself, to see whether it's just self-advertising, start with :

http://www.startuplessonslearned.com/2008/11/what-is-custome... http://www.startuplessonslearned.com/2009/08/minimum-viable-...