A few people have asked me recommendations for good resources/books on lean startups. That's my list:
Four steps to the epiphany let me say it clearly: this book is boring, badly structured and poorly written. However, it all started here. The Customer Development chapter, in particular, contains the essence of lean startups
Startup Lessons Learned this book contains all the archive of Eric Ries' blog. A lot of practical experience in applying lean and agile methods in startups