Rating: 5 / 5
Although written primarily for individuals wishing to move light and fast in alpine summit pursuits, Mark Twight's book Extreme Alpinism published by The Mountaineers contains methodology easily applicable to ultralight backpacking, thru-hiking, winter camping and more.
Granted a good portion of the book is devoted to the particulars of climbing gear but the layout is such that one can read only the chapters and sections that pertain to them.
The book discusses many aspects of physical pursuits which pertain very closely to backpacking. These include lightweight gear selection, dietary recommendations, training and fitness regiments and mental preparedness.
The term alpine style is used in the world of mountaineering to describe an individual or group of climbers pursuing a peak or route objective using the minimal amount of gear. This often means moving very fast and going light. Although I don't believeif Twight coined this term himself he does specifically point out that this term can and should be applied to other genres of physical pursuit. I have seen Demetri (Coup) Coupounas quoted as attempting the Colorado Trail Alpine Style - meaning unsupported and unresupplied.
Extreme Alpinism is worth a read by individuals who have honed their gear lists down to what they think they need and are excited to learn more about other aspects of their trade which they may not have hone such as fitness and nutrition.
I rate Extreme Alpinism 5 of 5 stars for being succinct, accurate and utterly lacking in b.s.