Welcome to Mobileread, cambodins!
Living on a boat. . .hmmm. . .well, at least it sounds better than camping!
(I am a known camping hater.
) As they've already told you, there are ways to download books from estores, but you can also download tons of free ebooks right here at MobileRead for both the Sony and the Kindle. Good luck with your decision.
Happy Reading.
PS. I really do think it would be nice to spend time on a boat. It sounds very romantic.