The Novels of Dashiell Hammett (all-five collection). Just started The Dain Curse.
Being fiscally conservative & responsible, I very rarely buy a book for myself anyplace other than a Goodwill or Salvation Army thrift store. Anyplace we go if there's an extra hour or two I can't pass up the thrift store book shelves. My last purchase was the nice boxed edition of the Complete Sherlock Holmes, something I pick up and re-read cover-to-cover every 2-3 years.
For those who don't object to reading what is out-of-copyright/public domain, there's tons & tons of great reading at Project Gutenberg. Don't overlook the Canadian & Australian affiliates, there's a lot of stuff at those sites not in the US site.