As soon as I read the blurb for the sequel last year, I was excited about this book. While the POVs change with the chapters to tell different threads, I looked forward to the story from Sam's point of view, since that would be totally new.
Having read it, I found it really un-put-down-able. (I read it in a day. My husband said "You're disgusting." He jests. Mostly.) The twists and turns were not only exciting, they made sense, and revelations were made at the perfect points in the story. (Two spies!). And the tension in the second-to-last chapter!
As a sequel, you'll have to read California Bones first to get the full enjoyment out of the book. But they're both worth reading, and now I can hardly wait for Dragon Coast, the final installment!