I added this to goodreads myself to make sure I can tell you not to read it, which feels weird and petty? I'm just! really passionate about Montessori education and the idea of someone curious starting here and forming their opinion off of this mess makes me sincerely upset.
Author seems to have a glancing understanding or bonkers interpretation of Montessori principles, using bewilderingly unnecessary authoritarian directives. There's a whole section of absolutes- you must always, you must never, if you x child will y - which makes it sound like parents are programming a robot child, and also are robots themselves. It leaves out the humanity and joy and creativity inherent to Montessori, which provides lots of concrete ideas and tools, but which is fundamentally humanistic, and understands deeply that people living together and caring for each other must do the work of understanding, compassion, patience, accommodation, and growth, and which both respects the capacities, and forgives the fallibilities, of kids and adults. The language in this book is as parental-shame generating as the great midcentury classics of parenting advice.
Also, and this matters less, but still - at a sentence level this book is just really badly written. Clonking and disorienting syntax, and many misused words. Once again lost in a sentence, then mentally retrofitting the near cognate that made it work, I began to wonder if the author might not be a native English speaker. If so they would be better served by writing fluidly and comfortably and then working with a translator, but I would avoid anything about Montessori from this source, regardless.