Yes, I've read the book. A few us here have autistic children - my son's not really a child anymore, he's 20. No, I wouldn't particularly recommend it for other parents of autistic kids - although I read all the autistic books I can find because I might learn something, and I need all the help I can get. You might find it interesting, who knows.
This is a perfectly nice book about a mom with a lot more money and support than most of us have, telling a heavily edited story. She TELLS us all she's tired, but she doesn't write like someone with the deep exhaustion, psychic and otherwise, that I know. Not that editing is a bad thing, of course.
This is one of those "my challenging child is a gift" books. My autistic child is no more of a gift than his non-autistic siblings. If you like the "gift" theory, and it gets you through the day, go for it.