It's a collection of hard-boiled crime stories with magic as an essential component, each story set in the City of Angels, where noir was born. It's the first in a projected series of anthologies, each to be set in a different city. Last I heard, New Orleans was next on the list. There are some fun, cool stories by some talented authors, including Yours Truly.
Buy it for the Nook here: http://www.barnesandnoble.com/