Solomon Kane for $4.99?
I already own the HC and now I'm grabbing the PDF. It's Savage Worlds with all the rules included and the awesome Solomon Kane world setting.
I'd learn the Savage Worlds rules to play in this setting.
Don't forget the FREE TableTop Day Bundle and the DCC RPG also for $4.99 (and 13th Age for $9.99 and Numenera for $9.99)