According to Keanu Reeves, they are:

1. Baudrillard: Simulation and Simulacra, 1981 (discussion)
2. Kevin Kelly: Out of Control, the New Biology of Machines, Social Systems and the Economic World, 1994
3. Robert Wright: The Moral Animal, Why We Are The Way We Are, The New Science of Evolutionary Psychology, 1999

Have you read them?

Some interesting background of the lead up to Reeves getting the Neo nod.