Someone tipped me off earlier today that Barnes & Noble has Wayne Grudem’s excellent one-volume systematic theology available for download right now for $14.99.
You can order it by clicking on here.
If you have yet to invest in a resource of this kind, I highly recommend you start here.
curtheffelfinger.com 
Oh, somebody stop me from name-dropping, but I met Grudem’s dad a couple of years ago, and he sent me a copy gratis! Woot!
Stop name-dropping you…you…name-dropper!