Thanks. One of the books I bought from Google is the Sherlock Holmes Complete Novels and Short Stories. I've read them so many times, but every once in awhile I just need to go back.
But the Google Books interface is a disappointment. The search feature doesn't really work reliably, and there's no lookup feature such as I see that Aldiko has (and the e-reader I had on my Palm Treo had). I'll definitely have to check it out, even if I can't get my Google books on it (although I get the impression from this post that perhaps I can, through the My Catalogs feature).