Steildmeyer's Master Class, Etzkorn's Trading with Oscillators, Phantom of the Pits by Art Simpson, books by Schabaker, Taylor and Cottle (Options).
I bought the first two Trend Dynamics volumes off ebay for $50 , they were written in 1994 and seemed outstanding for its time. Mostly based on price bar action and pre computer age trading. I do recommend it as a decent read, but did not find anything useful for my trading.