Oh oh I get to shout it from the rooftops! I’m going to be writing a “Greywalker Papers” crossover story with Kat Richardson (omg omg omg omg) as part of the upcoming URBAN ALLIES anthology, conceived of and edited by Joseph Nassise. Last week’s Publishers Marketplace announcement read URBAN ALLIES, an anthology of collaborative tales featuring the favorite characters of twenty top urban fantasy writers, including stories by Charlaine Harris, Kelley Armstrong, Seanan McGuire, Christopher Golden, Jonathan Maberry, and Larry Correia, among others, to Kelly O’Connor at Voyager, in a…