Something Wonderful Right Away
Limelight Editions - 20 USD
This is not a book on how to play Improv; it describes, in a series of interviews, the history of Chicago`s Second City, the theatre where Improv in the US more or less started. Although it won`t teach you much about Improv, the book is still an interesting read.
For several reasons: it is kind of amusing to hear about famous people`s less eh - interesting character features, and it`s also instructive to read how people discovered basic rules of Improv (like Accepting ) by trial and error.
The book is not exactly recent (although it is still available) but hey, you gotta know your history!