Outboard reference books
Now that I'm a boat owner, I'd like to get my hands on a book or two about outboard engines. I know quite a bit about them, but I don't know everything pertaining to maintenance, troubleshooting, etc. And I'd like something beyond the brand user manual.
Is there a good title out there, say something that would fall under the umbrella of Outboards 101? I'm sure there are titles on Amazon, but I'd prefer to have feedback on some books that any of you have used yourselves for reference.