The other reviews are right when they say the first two chapters have the meat and the rest is a list of pointless examples.
Even then, "the meat" is hardly rocket science. This has been well reviewed by others, but I am at a loss to know why. The useful advice (essentially "break up the task, cut out distractions, and make the effort") is all quite true. Do it and you will learn. But we all know that already. If you think that is a great insight you need far more help than this book gives.
Who am I to say these will help nobody ? If the first two chapters and examples work for you then good. But before you buy, do make sure you check out the first two chapters and an example so you know what you are buying.
I was livid that I had bought a Kindle book online which I would never have bought in paper format in a bookshop. But fortunately Kindle's "quick return" policy means I was allowed to return it. I did.