Shop Class as Soulcraft, by Matthew B. Crawford. This is a much more philosophical/academic argument that skilled manual labor is both intellectually and morally superior to most office work - you're shaping reality, rather than shaping yourself. I happily lump the craft of software development in with physical labor here, though, as it faces the same kinds of reality-based limitations.
Zen Mind, Beginner's Mind, by Shunryu Suzuki. Transcribed lectures by a well-known Zen monk. The entire book is basically about learning how to sit still. If you can't even sit still, how do you expect to do anything else well? And do you have any idea what it even means to just sit still?
