Is "Biophysics of Computation" still a good book?
I've looked through that book briefly but never really got into it... if I could suggest some others, though: Dayan and Abbott's Theoretical Neuroscience is a standard text in computational neuroscience but if I understand your question correctly, you might enjoy Kevin Murphy's Machine Learning: A Probabilistic Perspective, or David MacKay's Information theory, inference, and learning algorithms a bit more. Trappenberg's Fundamentals of computational neuroscience is also one of my favourites, but moreso on the neuroscience side of things.