Good to Great: Why Some Companies Make the Leap... and Others Don't (Jim Collins)
This book is at the top of my list when it comes to business books. To find the keys to greatness, Collins's 21-person research team read and coded 6,000 articles, generated more than 2,000 pages of interview transcripts and created 384 megabytes of computer data in a five-year project. The findings will surprise many readers and, quite frankly, upset others. I routinely return to it for advice and guidance every time I make a long term business strategy decision. Highly, highly recommend!