As far as my recommendation would go, it would be that learn from some of the best product managers out there. Read their blogs and see how they manage their products.
Getting Real and Rework are excellent product management books from 37Signals. Getting real has an online version which is free.
Besides read guys like Steve Yegge who is a good product manager:
Steve is a technical product manager and has many other posts on product management that give you insights into good product management.
Joel Spolsky has an excellent blog and books where is he fairly open about decisions that he took while managing his products at Fog Creek.
Here is one of his books which should give you some good insights into product management:
His blog Joel on Software also has some nice articles on product management ranging from pricing products, how to decide if a feature makes it into the product etc.
The best way to learn product management is from product managers like Joel, 37Signals, Steve Yegge and product management blogs like How to be a good product manager:
All of these links should get you started and if you “crawl” through the references that the above books and blogs should provide you should bump into other good product managers and pick up some serious product management advice. The information is based on real life products and the experiences their managers had instead of the Wikipedia page. I am hoping this is what you were looking for.
Happy reading and do let us know how it goes.