On IntelligenceI recently read "On Intelligence" by Jeff Hawkins. The book is about the author's efforts to understand the human brain's mechanism for intelligence and to apply it to machines. He presents a model of intelligence called the memory-prediction framework.

This was perhaps the first time I had read a somewhat detailed analysis of the possible mechanism that drives human intelligence. Some concepts that I found especially interesting were that of invariant and hierarchical memory. Also, the idea that the brain predicts all actions before they are executed was fascinating. If the subject interests you, I highly recommend it. It is quite readable.