If you are wanting to read some classics and just don't have a bunch of money to put out for the books, go to Dover Pub. If you hit their Literature and then you go for their Thrift Editions, you can get classics like Gulliver's Travels and Huckleberry Finn for $3 or less. Beowulf is one dollar. They have to be pre-copyright, though, to be in that section.
I ordered a whole set of them, including books I'd never heard of before (The Mabinogion) and books I love, but need a cheap copy for the boys to read (Father Brown Mystery Stories by GKChesterton).
I also got a book of fun quotes about books and reading.
“If you believe everything you read, you better not read.” Japanese proverb