There are two non-boaty books I think everyone engaged in sailing/cruising should read...
Especially for those considering jumping into the craziness that is VolksCruising.
One "How To Keep Your Volkswagen Alive" you already know about.
The other one is "Just Ride"...
It's sorta/kinda about bikes and bike riding but to be truthful it's more about cutting things back to what's important in a consumerist addicted and led world.
It's a good read.
If it helps, just substitute the word "Boat" for "Bike" as you read it and hey presto it's all about boats.