You have until Friday to save $15 on the Sheldon 3-pack of books!
The 3-pack combines books 1, 2, and 3 -- three books that would otherwise cost you $45 --but until Friday it's just $30 for all of 'em! Plus there's a cheap, bundled shippin' fee for gettin' them all at once, so you're saving there, too. Wa-BAM! Savings!