The Labyrinth Index

 Mhari used to work for the Laundry Service. The UK, in a previous book, has now a God ( the black pharao) as a PM and he is directing the Laundry Service, which he kinda dissolved. Mhari is a vampire and is send on an assignment to the USA, where everybody forgot that there is a President. She has to build up a team and infiltrate the country,  which somehow is full of an army of vampire policemen and their Service of the Occult actually took over to try and resurrect their god. 

 It's the usual fun of the Laundry Files