I took this on holiday with me and it was perfect holiday reading - funny, fast-paced, exciting and not too taxing! The main character of Joanie was very easy to relate to in many ways and made refreshingly little use of "feminine wiles" compared to a lot of lead female characters in urban fantasy novels. I also loved the fact that she made friends with a kick-ass fella, Gary, who just happened to be in his seventies. And the mixture of Celtic & Native American mythology was pretty cool. So, yeah, a bit different from the usual fare. 
 The main thing I struggled with, and what stops me giving four stars, was the infuriating vagueness about how Joanie's magical shaman powers actually worked. I also got kind of fed up with her banging her head all the time! 
 Definitely a fun and entertaining read. I will probably go on to read more in this series, just because I liked the characters so much.