Google Books has come a long way. If you want to play around with alternate formats for reading, check it out.
Personally, I can't read for extended amounts of time off a computer screen. More than 2 pages and I hit print. However, I absolutely love digital ink and the Kindle, so am prepared to give Google Books another shot.
Not sure how well it will go on the beach this summer. Sometimes sticking with print is still the best option. Happy reading!