The novels Blindsight & Echopraxis by Peter Watts have a nice vampire sub-plot... basically his world has vampires which have been revived from the fossil record. They are posited to have gone extinct in recent times, but before then were human's key predator, keeping our populations strongly in check and then having to hibernate for decades to allow the breeding to provide new meat!

He's super interested in brain disorders and spins a good story about the trade offs of a terrible reaction to right angles in exchange for savant like powers of perception.