The Lean Start Up: How Today's Entrepreneurs Use Continuous Innovation to Create Radically Successful Businesses by Eric Ries.
While working at Gap Inc. concepts from this book were frequently leveraged. I learned by doing. After leaving Gap I read the book and see we implemented some of the concepts well and others, less so.
This is a great book worthy of study. I created a book summary using my kindle highlights. The summary is almost entirely excerpts from the book. My goal was to create a reference or study guide for myself and to share with others. If you haven't read the book and don't have the time to read the whole book (takes maybe a few days) then this summary is worth your time to read. If you only want to review the key concepts - it is probably not for you.
If I had it to do over again I would have synthesized more and excerpted less. Live and learn.