Tinker, the main character is ridicuously smart, brave, cool and a little clueless. I enjoyed this read very much despite getting lost a couple of times when the gate/parallel universe info dumps got kind of complex but then the action would sweep me up again and all was forgiven. The H, Wolf, doesn't have an awful lot to do in this book as the action is mainly centred around Tinker - am hoping to get to know him better in later books.
This was a fresh, interesting read with an excellent smart lead in Tinker.