Cuckoo's Egg
Clifford Stoll
Play Matters
Miguel Sicart
Playful Thinking (1)
The Transfer
Veronica Roth
Divergent (0.10)
Raft
Stephen Baxter
Xeelee Sequence (1)
Essays in Humanism
Albert Einstein
The Nature of the Physical World: Gifford Lectures
Arthur S. Eddington