@Leucrotta Asked a naval history buff friend of mine, and he had a lot to say.
"If it is the voyages of Zheng He (early Ming Dynasty, active exploration 1404 est to 1431 again est) the best Western language book would probably be Dreyer's Zheng He, China and the oceans in the early Ming Period. Gavin Manzie's books I personally wouldn't touch with someone else's fifteen foot pole, they're poorly researched and don't include a lot of primary sources."
(cont.)
@Leucrotta Happy to ask around for a friend! 💙