In the beginning of the book, it has a "Zen" Gallery of bonsai. There are two areas for each that describe the tree. Your normal species, size, age and origin. And the Zen qualities of the tree.
An example:
A tree named "Immortal" (not sure if I like naming trees just yet)
style: driftwood
height 43"
species: Japanese Yew (Taxus cuspidata)
origin: South Korea
training: five years
Zen qualities: This ancient yew transplanted from the wild retains a high degree of naturalness, providing a powerful subject for contemplation and meditation. The stunning contrast between the brilliant bleached white of the trunk and the fresh, vital spring green of the needles brings to mind Zend concepts of rebirth and life giving force.
Dont know how you feel about that, but it makes me feel all squishy inside.

Actually, I think it is a nice, fresh way to "see" trees of an artist, that does practice the art of Zen. (Which by the way, means to sit and meditate)
The book does ride softly on the Zen mantra. It doesnt beat it to death, in my humble opinion.
He covers a style called "Hobbit" inspired by Lord of the Rings of course. The trees pictured are nicely done, hollowed trunks and Entish looking.
I look forward to your follow up when you get the book. Curious to see if you have the same reaction as I do.
Paul