I've download the free pdf. file and I'm planning to study the book but some stuff is pretty useless there, anyway I know there are many people that have learned everything in the book so I would really appreciate if some of you guys could list the most useful stuff that a card magician can use there since many great card magicians are experts on Erdnase, book must be really good however the English is not my first or even second Language and the text itself isn't easy to read would prefer not to waste time on reading something that is not useless, so again the listing of the most useful stuff there would be very much appreciated...