These are the two best books around.Get them both. It will be the best investment you ever made.
Do not think about them as “advanced technique”. Everything they say can be used straightaway from the very first lesson. However, the musical examples (particularly in Sandor’s book) are taken from the advanced repertory. If you want the same kind of ideas with elementary examples, try Seymour Bernstein “20 lessons in Keyboard choreography” (Hal Leonard).
They both say more or less the same thing and follow more or less the same principles. However the way they describe it is very, very different. I found they complement each other beautifully. Because the concepts – although more or less the same – are organised and presented very differently, one informs the other. You may not understand what Sandor is getting at until you see the same thing explained differently by Fink and vice versa.
It is a real shame that Sandor’s book does not come with a video. Fink’s video is absolutely essential. These things cannot be really written about. You must see it demonstrated. But publishers are really mean people. You will have to buy the video separately. If your funds are very limited, buy the video first and the book later. And if you have to choose between both books, I would probably recommend Fink’s not because it is better, but because of the accompanying video.
Also have a look at your local library and compare both books (or borrow them from a friend) so that you can check for yourself.
Best wishes,
Bernhard.