Kind of a mash up of Dr. Who and Sherlock Holmes. And I wish the publisher hadn't written that on the book flap, because it was glaringly obvious within the first 10 pages that this was (hopefully) an homage to both. Basically, it was a bit of a punch in the face. It was a fast-paced, quick read, highly focused on plot without a lot of character development. I was entertained and enjoyed it, but I would hesitate before recommending this to Whovians or Sherlock Holmes mega-fans. Tread lightly, is all I would say.