Just search for Day Trading Bible by Wyckoff. There are free electronic copies in many places. It will give you sound basis of what he teaches. He wrote this book years after Rolo Tape Reader, and it is one of his best.
This was my 2nd Wyckoff book (after "how I trade stocks & bonds"). I liked the day trader's bible but he doesn't teach his technique in my opinion. There is no talk of selecting stocks, timing, etc.
