I found Sir Arthur Conan Doyle's Sherlock Holmes books here. I'm a big fan.
I'm just starting Lost Horizon on Gutenburg.net.au; the James Hilton book is just as I remember it, of course.
I checked out Robert A. Heinlein's Stranger in a Strange Land, and, yes, it's available online.
Here's a link to a bunch of Agatha Christie novels.
Finally, I've just started an Agatha Christie book, The Secret Adversary, on Pagebypagebooks.com. It's Christie's first Tommy and Tuppence book.
Beware, though; some "free" sites still ask you for a credit card to get started.
Enough for now. More later. I think I'll read a bit more Lost Horizon.
More blog entries by Tom Gillispie
• Advice for be and would-be novelists
Anecdotes by Tom Gillispie
Entries from The Dog Blog
Blog entries from The Auto Racing Journal
(a book of great stories about the Intimidator)
(the book of great NASCAR stories)