Fred, the Vampire Accountant book 6. Spoilers ahead for the earlier ones.
This is the wedding one. However, it is, as usual, incidents in the life of Fred, the Vampire Accountant. He mentions that there are things he must get out of the way before the wedding, but they are not all intrinsically bound to it. Like the first person to ask Amy for financing and the attempt to hire another paranormal to train as an accountant -- both of which get interesting. Looking for venues also features. The Blood Council is curious about Fred's unusual traits. Fireworks, mints changing type, a fae causing some trouble, and Quinn causing trouble. And more.