It's My Birthday, Too is a short story in The Dresden Files series by Jim Butcher. It is set between White Night and Small Favor,. It was originally published in the anthology Many Bloody Returns, and is included in the anthology Side Jobs.
Molly Carpenter and Harry Dresden have just returned from battling slime demons and are cleaning things off. Before driving his apprentice home, Harry decides to bring Thomas Raith the birthday's gift he's bought for him. Molly admits she knows they being half-brothers.
Thomas is at the Woodfield Mall, playing a game of "Evernight" as a favor to Sarah one of his employees. The mall is closed, but one of the shops is lit up, without courtains, and some cars are still in the parking log; furthermore, two individuals in long black hoods walk into the mall; Harry takes out his .44 revolver and goes inside.
Inside the shop, a group of people, dressed predominantly in black, looking like vampires, but their acne shows they're just young people in costume. Security guard Raymond stops him, asking him why Harry is around, admitting he has recoginzed him from six or seven years ago at Shoegasm. They're joined by Thomas and Sarah, prompting Raymond to go outside to fix a broken camera.
Calling for Molly to join them, they notice she's in psychic shock, after witnessing the killingof Raymond; something has entered the mall that should not have. The streetlights go out and an attempt to contact Karrin Murphy on the phone fails; electricity goes off. After a car has crashed into the mall, and lights start getting on and off as if a child were experimenting with the switches, a voice on the public announcement system introduces the presence of Constance Bushnell, which had disappeared one year earlier, and has returned to exact vengeance on the "Evernight" players.
While Thomas watches over the group of youngsters, Harry enlists help from the Shoegasm cobbs in finding out that Bushnell has become a Black Court vampire and fights back, destroying her and herminions.