The Many-Headed Hydra
by Peter Linebaugh and Marcus Rediker

This book gives much food for thought, bringing a fresh perspective to number of themes such as slavery and pirates which help put English peasant struggles of the time in a wider context.

Whilst I would highly recommend it, I would also advise with some caution as the scholarship is not as widely respected as it might be.

This review from the Guardian does a good job and it worth a look – http://www.theguardian.com/books/2001/jan/27/historybooks