I was thinking about that e-book thing. Can't you incorporate video clips into an e-book?

And a few guest authors on various specialties (like the curved boards, wing sails, etc).

The basics remain the same - tacking/gybing, displacement vs. planing vs. foiling, apparent wind, tactics, etc. that are in the present book.

Throw in a little multi-media and that thing would probably sell like wildfire..