This book is geared to amateur serious piano players with pretty good theory knowledge, who are playing for a while, although some tips will be useful even for beginners. One of these tips is hard passage(or how author calls it- fracture)practise. First play the whole piece, and mark the hard places with a few notes before and after to put it in the context. If the whole piece feels like hard places, then this piece is too hard for your level, and should be put away for later. Then author goes into the detail about how to practise fractures-he himself played them 25 times a day. Overall, he assumes, amateur will practise about 1 hour each day, and recommends to spend about 40 minutes playing pieces, 10 - improving technique, and 10 sight reading. 10 minutes might seem very little, but as author points out-it becomes 60 hours a year!
The book also gives suggestions for classical pieces to play(and you will see, that he loves Chopin...:))in groups of increasing difficulty.
There is a chapter about memorizing the piece, with suggestions for memory aids.Author recommends to mark all the aids on the score, so if you come to piece later, you can quickly remember them.
One chapter is devoted to technique -lots of examples and recommendations as to what exercises and books to use - some of them can still be bought. He doesn't recommend Czerny, because "we are looking for ways to warm, not chill, our music making."
There is a short chapter on sight reading -basically analyze the piece before playing it, and then just play anything you can find, while keeping the beat, even if notes are suffering a bit as a result.
Then he takes several classical pieces and study them in depth.
The last chapter is about polyrhythm - as when one hand plays 2 notes while other plays 3 and other harder combinations. Author gives several methods to try.
So the book is definetely a gem, and worth reading. I wish it would have had more basic topics as to how to practise one hand staccato with other playing legato, pedaling, etc. But it seems like his book is not meant for beginners, so he leaves out these basic things.