A glorious graphic adaptation that plays to that genre's strengths: namely, the art in The Hidden Life of Trees is stunning. Some of the full page designs could hang on the wall, but even the more quotidian scenes showing the author's life are gorgeous and full of life. There's a hint of Bill Watterson there that I loved.
So, the art is good, but what about the text? Also strong! There's a ton of fascinating information about trees here, almost too much to handle. I particularly loved all the ways that trees and forests are revealed to be families, using intertwined roots and mycellium networks, as well as aerosole indicators, to communicate. The book also does a great job of showing how trees move on a different timeline from humans, something we repeatedly fail to (or refuse to) grasp.
That said, much of the text is taken up with climate change whinging, which, while very real, detracts from the fascinating science stuff. Just as soon as you learn a cool fact about a tree, you learn that basically every tree in an urban environment is sad and slowly dying. And that almost all our primary forests are gone (and those are the ones that matter). The original author, Peter Wohlleben, does seem to have written The Hidden Life of Trees from something of a dark place (his work was hurting him in several ways), and I think that's obvious from the text. There's just so much sadness and despair here, it really undercuts the beauty of the forest. (There's probably some kind of "seeing the forest for the trees" metaphor here, but I'll leave that one aside)
Overall, an often stunning and eye-opening reading experience that's tempered by the author's outrage at humanity.