I've read a good many of the Doctor books these past six years, and this is easily one of the best. It's creative, layered, vivid, true-to-form, lively, and timely. This is a great place to start if you've never read one and it's a great next read if you have. In fitting style to the current Moffat Who-niverse, it's chock full of wibbly wobbly timey wimey stuff. And it's got great characterization. I am looking forward to this author's next foray into Doctor territory.