[divan]

- Self-Determination Theory (SDT) by Deci and Ryan - finish (and probably re-read). It's a major theory in psychology on human motivation, and it's one of the worldview-shifting reads for me. It's as nerdy and scientific as you can get to the motivation research, and it applies virtually every sphere of human interaction - work, parenting, sports, relationships, education etc.

- The Constraints-Led Approach (CLA) Principles for Sports Coaching and Practice Design - CLA is the the best sports coaching (and also quite nerdy) philosophy I've found so far. Unlike SDT it's mostly concerned about motor skill acquisition science.

- Collection of books on figure skating starting from 1880 - aside from purely historical value, they have incredible knowledge on how to perform figures (that's where name "figure skating" came from) - the art almost extinct nowadays. It's a foundation of this sport, but as international federation removed them from competitions, nobody learns or teaches it anymore, so we literally loosing the roots of the most important skill in figure skating (US and Canada are doing better than everyone else, you can still learn and pass tests in figures, but that's quite unique cases).