The best leadership book I've read (and I've read most of them) is called The E-Myth Manager. It is a book that you will likely want to read more than once because some of the theories are almost 100% the opposite of what you've been taught over the years. However, it is a great, great book and makes unbelievable sense once you adopt the E-Myth way of thinking.
It is available at any bookstore and on-line through any book dealer.
This book doesn't have anything to do with Coach Bryant but frankly there wasn't much taught in terms of leadership or management from Coach Bryant. His leadership was evident by the many qoutes he gave and the most telling quote and the one that lends itself to leadership more than any other (IMHO) was this...Coach Bryant once said that he only hired people who were smarter than him at their jobs. He thought that if he was smarter than they were, he had no use for them. Basically he was saying to surround yourself with people who are better at what they do than you are at doing what THEY do. It doesn't mean that you can't be a great leader...it means that you need people you can trust to do their jobs and do it well. Everyone is responsible for themselves and for the ultimate success or failure of the team. It also says that just because someone is great at their job, doesn't mean they are a great leader, thus the need for great leadership.
Interestingly enough this correlates directly to the E-Myth Manager.
I hope this helps!