I'm joining Duane Swierczynski and Bill Crider in recommending that you order the July selection from Stark House.
It's hard to know which to be more excited about, the three rarely seen Harry Whittington novels or the long, superb piece of scholarship by David Laurence Wilson. Wilson's introduction gives you a bracing history of Harry, what the paperback original market was like at its peak, and the the strange history of "blackbox" softcore porno. This is a must-have book. Advance orders takennow.