I'm still learning Wyckoff but there is a ton of free material out there. You should look at DBPhoenix post here and on traders lab. I also like David Weis as a Wyckoff source. I'd start with the original course.
http://cdn3.traderslaboratory.com/f...off-resources-wyckoff-method-tape-reading.pdf
Unfortunately, the "ton" of free material out there is mostly what somebody thought about what somebody else wrote about a variation of Wyckoff. I'm not aware of anyone who bases his work on the original course. I suggest, therefore, that you stick to the original course, above. Read Section 7 every weekend and you'll be in far better shape than nearly every trader out there.