Haven't read ten books about boxing myself..

But an excellent fictional story centered around boxing I read was "The Power of One" by the Australian author Bryce Courtenay.

Fantastic book, one that you don't need to be a boxing fan to enjoy, but it certainly helps. It's been a few years since I've read it and would recommend it to anyone looking for an excellent fiction book.

Some reviews:
Amazon.com: The Power of One: A Novel: Books: Bryce Courtenay