The following text books have been made freely available by the authors for on-screen reading:

• Reinforcement Learning: An Introduction
  Sutton, R.S., and Barto, A.G. link
• Information Theory, Inference, and Learning Algorithms
  David J.C. MacKay link
• Convex Optimization
  Boyd and Vandenberghe link
• Neuronal Dynamics — From single neurons to networks and models of cognition
  Wulfram Gerstner, Werner M. Kistler, Richard Naud and Liam Paninski link
• Spiking Neuron Models — Single Neurons, Populations, Plasticity
  Wulfram Gerstner and Werner M. Kistler link

_{The photo above was taken from a Tweet by Nima Dehghani https://twitter.com/neurovium/status/1239629687610953731}