At first, it was mostly fun watching disaster strike the eastern seaboard, and seeing our heroes' adventures in places I'm familiar with. But somewhere in the last 100 pages, I finally realized that it had become a chore to read, and I finally put it down.
The final straw for me was the Scroll that Magically Turns into Whichever Book You Want to Read But Only If You Say Your Wish Out Loud. That sounds like something out of a fairy tale rather than a fantasy novel, and isn't what I'm in the mood for right now.
On the plus side, Woosley does know Baltimore, and her descriptions make it clear that she has experience with people with cancer, or at least she's done her research. And hey, who wouldn't want to see Babylonian gods firebomb the Chesapeake?