Born to Run by Christopher McDougall was pretty influential for me as a runner.
Men's health journalist who had a bunch of injuries and couldn't figure out running even though he had tried to run his whole life, and then ends up traveling to a tribe in Mexico whose whole culture is centered around running.
There are some practical descriptions of their running methods, and I think the most important part was changing how I thought about running and placing the emphasis on running slow and safe and comfortable, especially in minimalist footwear since it's a lot more obvious in thin or no soles if I'm running weird than it is in thick soles, and once I'm running slow and safe and comfortable, speed naturally comes after.
I didn't start running marathons until after i reset my technique to a basis of running comfort and smoothness first.



