This one is by Carrie Vaughn, entitled "Nuestra Señora de la Esperanza." The illustration is by the amazing John Picacio.
An untold tale of Earth Witch in the aftermath of the events of the first Committee triad, "Nuestra Señora de la Esperanza" is all new and original, published here for the first time.
You can check it out at http://www.tor.com/stories/2014/10/nuestra-senora-de-la-esperanza-carrie-vaughn
Check out Carrie's other books as well.