On a sidenote i just started to read "The Swerve" which is about how epicurs thoughts (by Lucretius "On the nature of things") were rediscovered at the beginning of the renaissance, until now a great read (and Pullitzer price winner last year, apparently)!
I'd also recommend Epicurus's writings. Not exactly stoic, but they go hand-in-hand. See: http://classics.mit.edu/Epicurus/menoec.html