Some of My Favorite Running Books
Inspirational Running Books
Training for Ultra-Running Books
Marathon and General Training for Runners Books
Science of Running - Steve Magness has a good blend of research-backed and experience-based approach to running. He thinks critically about what he does as a coach, but his writing tends to be a little long-winded and tedious. So not for the faint of heart!
Running Science - Really focused on advocating what is backed by research.
Healthy Intelligent Training: The Proven Principles of Arthur Lydiard - the Lydiard approach is pretty classic in terms of a systematic approach to run training, but leaves some room for personal experimentation.
Daniel's Running Formula - Kind of a classic attempt at a very numbers-oriented approach. It's definitely a system - maybe not the perfect system - but a well-defined system.
Running Form and Strength Book
Running: Biomechanics and Exercise Physiology in Practice, 1e - On the pricier end, and talks a lot about sprinting. But a pretty in-depth look at running form and physiology.