Michael Crichton, best known for his science fiction novels, died a little over a year ago. The complete but unpublished Pirate Lattitudes was discovered after his death.
The story takes place in 1665, and is set in Port Royal, Jamaica and the surrounding waters and islands.
It is a story about privateering, and as such involves intense sea battles with artillery. Culverins, sakers, cannon. Along with odd 'new' and improvised devices such as "granados" and even time fuses made of black powder packed in rat intestines!
I thoroughly enjoyed this book and read it in two sittings.
Is it 100% accurate in every detail as far as the artillery is concerned? I can't say, beyond my realm of knowledge. But knowing Crichton, it is as well researched and accurate as he could make it.