The text is brilliant, and at times inspiring. It is also answering the wrong question.
St. Irenaeus, in Against Heresies, talked about how the heretics started with what I would term a wrong "skeleton" (hypothesis), then moulded "clay-like flesh" (plasma) around the skeleton to create the wrong thing. St. Irenaeos states, "Their manner of acting is just as if one, when a beautiful image of a king has been constructed by some skilful artist out of precious jewels, should then take this likeness of the man all to pieces, should rearrange the gems, and so fit them together as to make them into the form of a dog or of a fox, and even that but poorly executed; and should then maintain and declare that this was the beautiful image of the king which the skilful artist constructed, pointing to the jewels which had been admirably fitted together by the first artist to form the image of the king, but have been with bad effect transferred by the latter one to the shape of a dog, and by thus exhibiting the jewels, should deceive the ignorant who had no conception what a king's form was like, and persuade them that that miserable likeness of the fox was, in fact, the beautiful image of the king."
Chryssavgis's text quotes for the most part unimpeachable Orthodox sources. And individual details are in some continuity with Orthodox Tradition. But the overriding purpose to which all these quotations are conscripted is an overall shape which would have been impossible before environmentalism as we know it, there is no justification given to the archetypally strong language of rape in talking about any misuse of the earth, and he speaks about becoming "disciples of the earth" without talking about being "disciples of Christ". In the end it seems, tacitly for the attention he gives, that the Creation is the center of gravity around which the Church and Christ revolve, rather than Christ being the center around whom the Church and Creation revolve, and the Church revolving around Christ more than around Creation. Now of course individual passages may clarify "Christ is the head," but the overall (deliberate) impression formed by what he says and how much he says it places Creation, not Christ, as the Center.
Now the Orthodox Church does respect Creation and has NEVER drawn too sharp a line between Christ the Savior of the Church and Christ the Savior of Creation. But it talks much more explicitly and focally about Christ the Savior of the Church, and the threads that are presented as if they were the bread and butter of Orthodox Christianity talking about Creation when they are in fact a descant and nine out of ten sentences in any classic Orthodox sources I have read, including EVERY classic I have read and recognized among this book's sources, and there is a good chunk of Orthodox dough that is left outside of Chryssavgis's cookie cutter. To quote just a few words from the end of Chapter 15 of The Ladder of Divine Ascent, arguably the greatest Orthodox classic since the Bible, which Chryssavgis mentions briefly (and it would be extremely insulting to doubt that Chryssavgis knew even if he didn't mention it): "By what rule or manner can I bind this body of mine? By what precedent can I judge him? Before I can bind him he is set loose, before I can condemn him I am reconciled to him, before I can punish him I bow down to him and feel sorry for him... He is my helper and my enemy, my assistant and my opponent, a protector and a traitor. I am kind to him and he assaults me... If he has a rest he becomes unruly. If I upset him he cannot stand it." This is a major thread in Orthodox literature, more major in for instance the repeatedly cited Maximus Confessor in Chryssavgis, and it is simply left out of the cookie cutter stamp of marshaling Orthodox theology to the service of environmentalism. It is part of the flesh of Orthodoxy that is not attached to the new environmental skeleton in this book.
Some passages in the book are beautiful. Some could be used to make a better book. But the title, like most other books with a title beginning with "Beyond...", is a warning label that what's going on is marshaling Orthodoxy in the service of something else, or taking clay-like flesh to fill out contours on an unrelated skeleton.
I am eminently concerned with many of the questions the book addresses; I write about some of them myself, but my concern is in the service of Orthodoxy, not about Orthodoxy in the support of environmentalism.
CJS Hayward, author, The Luddite's Guide to Technology, which intended to an Orthodox ascetical look and is eminently concerned with Creation, but is intended to look at things in light of Orthodoxy instead of marhalling Orthodoxy to serve environmentalism.