Leila Haapaaranta’s collection The Development of Modern Logic came out earlier this year. It’s a handy one-volume compendium to the history of logic in the modern era (full disclosure: I have an article in it). The price tag might still be a bit steep: $150, although that buys you over 1,000 pages of scholarship in an attractive hardback volume! But if you have access to Oxford Scholarship Online, you can now also read the book over the intertubes.
Also online now: JC Beall’s Spandrels of Truth.