Just finished the final book in C. E. Murphy's Walker Papers series, "Shaman Rises", and loved it. It tied everything up well.
It's an urban fantasy series set in Seattle and one of my favorites. Not everything is black-and-white, and the main character starts out as a very reluctant shaman indeed. It contains a nice mix of Celtic and Native American mythological characters and archetypes, and it's written with an undercurrent of wry humor that helps to provide a counterpoint to the evil that occurs. The author provides a individual summary of all of the preceding books at the beginning of this one, but for maximum enjoyment I would recommend starting the series at the beginning with "Urban Shaman".
If interested, you can check out my Amazon review (I'm "Mayfayre" over there):
http://www.amazon.com/gp/cdp/member-...R1UN1K0ECSGJDC