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Fire Me Up (Aisling Grey, Guardian, Book 2) (edition 2005)
Fire Me Up by Katie MacAlister
References to this work on external resources.
Wikipedia in English
Amazon.com Product Description (ISBN 0451214943, Mass Market Paperback)
Aisling Grey is back-and in more trouble than ever. She thought being a courier would be easy. It's not. She thought being a Guardian would come naturally. It doesn't. She thought she could get out of being a wyvern's mate. She can't. And she never thought she'd be irresistible to men. But she is.
(retrieved from Amazon Thu, 12 Mar 2015 18:21:28 -0400)
Aisling Grey, a demon lord and Guardian, attends a convention of supernatural beings in Budapest while delivering an amulet and trying to avoid Drake, the wyvern of the green dragons who is also her ex.
(summary from another edition)