It came in the mail today! The Techniques of Sprang by Peter Collingwood!
It was offered to me by email and I bought it for $15. It's in great condition.
I can see why everybody says I need this. This book is a textbook on sprang. There is 300 pages and most every other page has a chart or diagram on it explaining this or that aspect of sprang.
I'm going to be reading on the bus for a while.
Have a good day!