Not completely useless
I was attracted to this book by all the positive reviews, but now that I've read the book, I have to wonder if the good reviews are all fake. They all say "verified purchaser" but they all read as if they're written by the same non-native English speaker and all within a couple of weeks of each other. The book was free for awhile and maybe that's when "they" all "purchased" the book.
In any case, I found that the book's explanations are abbreviated--like someone who was trying to demonstrate their knowledge instead of teaching it--and often non-sensical. The organization and writing confusing to a PowerShell beginner, I think.
I learned a couple of things I didn't know before, which is why I say the book isn't completely useless, but it's not worth $2.