Princeton University Press having their annual 70% off sale, some good stuff in there. (P) indicates protocol -relevant
Ordered (I do not need more books lying around)
The Ant Collective | Princeton University Press (P, stigmergy) The Weirdness of the World | Princeton University Press (P, non-human agents) Agent_Zero | Princeton University Press (P, agent-based modelling)
Looked interesting but didn't buy
Postcards from Absurdistan | Princeton University Press (about Prague)