Kenssie is a demon who feeds on people's secrets. She is the servant of a master demon who feeds on humiliation and recently it feels like her powers are waning. Her only hope lies in stealing a powerful grimoire and getting her powers back before a fear demon can make her his bitch for all eternity.
The Secret Eater isn't a long book - it only took me a day to read - but it's a really good introduction to the world. There's a second book - Diabolical Taste - which I'm also tempted by.
The plot rockets along at a good pace, so it's certainly never boring and the idea that demons wander around manipulating humans in order to feed on their negative emotions is kinda cool. Kenssie's a kick-ass protagonist, although her boss is kind of a dick. But then, he's a demon, so I suppose that's to be expected.
All in all, I give this book a solid...