You can tell this book by its cover, which gives most of it away in the title. Except that many keel boat sailors, especially cruisers will like the details of boat and sail handling, as well as salivate over navigational details in the passage between Puerto Vallarta and the Marquesas Islands. Author Steve Van Slyke is an accomplished blue water sailor and has published a nonfictional account of his experiences in Kavenga's Wake.
For myself, I had trouble in the early going with my suspension of disbelief. I found plausibility problems with the early details in this whodunit story line. But that's because I was overlooking a lot; as Trophy Wife comments, often I have difficulty with paying attention. So fault the reader, not the writer.
In the end, which is worth pursuing, all is tied together. Even for this non-cruiser.