I do mainly audio books.
For the best deal I've ever seen:
They have a 10 DVD
set of over 600 books in MP3 format for only $100!!
Less than half are actually full length books, lots of short stories, so below when I say "books" I mean different titles.
I got the (then 9 DVD) set a few years ago and am just now over halfway through. Some of the files are corrupt and a few out of order, but for the price
it's great. It's almost all public domain classics, so mostly good reading. Lots of old sea stories. Almost all are read by 3 or 4 British actors and their performances range between OK to very good, depending on actor and book tone.
I also check out audio books from the library and rip them for my mp3 player. I can get about 100 "books" from the DVDs, or 30-50 full length books from the library loaded on my 8gb player.
BTW: You can download books for free off this site, but for me the quality of the free ones are so bad it's just not worth it. And to download all 600 "books" would take so long, the $100 just seems cheap
OK, sounds like an ad, but it's just a great deal. So, that's why I'm not too interested in a book swap. But Gord's method of going boat-to-boat is a good one. Good excuse to say "Hey!"