I loved it, and frankly, the rest too. I'm binge reading them, easy enough to do during COVID isolation. I noticed the wording is a bit 'different' and emailed the author. English is not his first language, nor even his second, but he writes in it because English is so nearly universal.
The locations he writes about, and the sailing details he incorporates, are from personal experience, although obviously not the recounts of distant yesteryear. All in all, I get the impression of a deeply intelligent man who loves sailing, the sea, nature, and men, not necessarily in that order.