A few months ago, i was in the local book store just after school. Sadly, it was going out of business, but there were great discounts. I found out they had a book about dutch naval heroes, like De Ruijter, Maarten and Cornelis Tromp, Piet Heyn and a lot more. I don't know where you're from, but if you can read dutch: the book is called "Zeehelden van de Gouden Eeuw". The paintings and drawings in the book are beautiful, just as the stories of the admirals, captains, etc...