Kaibab Unbound (The Iron Druid Chronicles #0.6) by Kevin Hearne published in 2011
A short story in The Iron Druid series that occurs two weeks before the events of the first book.

How was it? The short story really hammers on the fact that Atticus is old 2100 years old and in hiding. Two facts were already touched upon in the past two shorts [1, 2], except here some light is shed on who he’s hiding from and why. The world-building continues though, as we’re getting acquainted with witches. We also learn about one more – a hound – of the four animal shapes Atticus can bind himself to.