come with me darlin' way beyond the sea

Received a 20% off coupon from Borders in my email. Oh, the power!

I'm saving my pennies for the Manchild DVDs and the new Jasper Fforde book (Something Rotten, squee!!) in August, but I've decided I can afford one book.

Being paralyzed by indecision, I ask you, my rabid horde of bibliophiles: what book should I buy with my Border's coupon?

Help me, Obi-Wan Kenobi friendslist, you're my only hope...