"Neural Networks and Deep Learning is a free online book.
The book will teach you about:
- Neural networks, a beautiful biologically-inspired programming paradigm which enables a computer to learn from observational data
- Deep learning, a powerful set of techniques for learning in neural networks
Excellent visualizations (interactive charts)
How the Bitcoin protocol actually works | DDI
mentioned in: fast.ai online class
Practical Deep Learning For Coders—18 hours of lessons for free