Peak - a great book about the benefits of Deliberate Practice.

Deliberate practice is the purposeful and systematic approach to practising a particular skill by continually pushing yourself outside your comfort zone

Ericsson and co-author Pool do a fantastic job in breaking the myths of what it takes to become an expert in any skill. They deliver and clarify decades of research and offer new and sometimes counterintuitive methodology in breaking down the “barriers” of mastery.

You can enjoy my review here at The Hidden Why.