Summer Knight - Book 4 of the Dresden Files series by Jim Butcher. Private detective/wizard-for-hire Harry Dresden is suckered into tangling in the affairs of Faerie, where the fate of the entire world-and his soul-are at stake.
Blood Rites (The Dresden Files (Unabridged Audiobook) - Harry Dresden, Chicago's only professional wizard, takes on a case as a favor to his friend Thomas - a vampire of dubious integrity - only to become the prime suspect in a series of ghastly murders.
Small Favor - Dresden Files bk by Jim Butcher No one's tried to kill Harry Dresden for almost an entire year, and his life finally seems to be calming down. For once, the future looks fairly bright. But the past casts one hell of a long shadow.