Sarah Beth Durst's Conjured is currently $1.99, and THAT IS A STEAL.
I love, love, loved it and will be an evangelist for it to the end of my days:
Occasionally, I read a book that I love so much that I don't even want to evangelize about it. I love it SO much that I want to skip past the part where I talk it up, where I convince others to read it, and just get right down to the gushing. I want a pile of copies to give out to anyone and everyone who crosses my path. When I hand it over, I want the recipient to start reading IMMEDIATELY, while I intensely, creepily stare like Damon Salvatore to be sure that the book is being relished to the degree it deserves.