I've been 'product managing' for 4 years now in NYC and haven't found very many books useful. Here are a few: -Getting Real / Rework (37 signals) - Build a lea

I've been 'product managing' for 4 years now in NYC and haven't found very many books useful. Here are a few: -Getting Real / Rework (37 signals) - Build a lean product -Don't Make Me Think - Usability 101 -Web Analytics 2.0 - Metrics are your best friend -Viral Loop - Great companies and how they did it -Delivering Happiness - Last 50 pages are phenomenal for building your company's "culture"