Although I think Crossing the Chasm is a great book and will give you perspective... it is largely about the final stages of being a startup. After you cross t

Although I think Crossing the Chasm is a great book and will give you perspective... it is largely about the final stages of being a startup. After you cross the Chasm, you are a mainstream company. The 2 books that I recommend for early stage startups are "The Lean Startup" (especially for consumer) and Four Steps to the Epiphany (especially for B2B).