Seven Waters Trilogy Comments
Seven Waters Trilogy (Juliet Marillier)
Celtic fantasy that rocks. Marillier's books have some of the best female characterization in fantasy. These books have a decidedly romantic bent to them. Then again, what books don't? Well worth the read for some of the best romantic fantasy out there.
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I found it tedious to read
I think you mean Jacqueline Carey's Kushiel's Dart, not Kashienda's Dart... 
Another great Celtic Fantasy series is The Mists of Avalon saga by Marionn Zimmer Bradley. Or maybe The Warriors of Alavna by N.M. Browne.
Amercian Gods, by Neil Gaimon is excellent as well with bring the old gods into the new world.
Somewhat difficult to find is this one. Holdstock's novel is an absolute masterpiece which (gasp) is rumored to be going out of print. A very original and poignant story, written beautifully. Nice to see this on the list.
I really enjoyed this book. I thought the ending was a bit unsatisfying though.
Another example of ancient gods coexisting with modern society is Guy Gavriel Kay's "Ysabel".