Building Expertise: Cognitive Methods for Training and Performance Improvement by Ruth Colvin Clark
This is a book I am reading currently. It was recommended by someone who read by blog post about procedural memory. Started reading last night and I am almost 90% through with it. This is very good book on expertise development process.
The book is written for those involved in training industry, but it clearly explains many concepts we have been discussing here for few years now.
Highly recommended if you want to go deeper in to understanding of expertise development process or in training industry like corporate training, instruction design or teaching.
It is also very easy to read unlike other books on expertise.