I just noticed that "It's My Birthday Too" doesn't have its own stickied thread, whereas all the other short stories do!
The blurb, from Amazon.com:
New York Times bestselling author Jim Butcher's crime-solving wizard Harry Dresden, of the Dresden Files novels, heads to a role-playing party to give his vampire brother a birthday present in "It's My Birthday Too," only to discover there are some bloodthirsty party crashers who don't share their brotherly love.
MonstersAndCritics.com adds the following:
Fans of Jim Butcher’s The Dresden Files will enjoy further adventures of Harry the wizard and his apprentice Molly as they go up against a revengeful vampire of the Black Court in the suspenseful “It’s My Birthday, Too”.
And according to Fred (the tease!), it involves LARP.
Preorder
here! It's due in stores September 4th, and it's edited by Charlaine Harris.