It seems a shame that just after reading the just-now-Newbery Medal-winning The Graveyard Book I would pick up the all-together pedestrian* and disappointing Interworld by Gaiman and Michael Reaves. An afterword reveals that the pair wrote the book as an extended pitch for a TV show concept they had created years ago and that when it failed in its purported purpose, it lay in the proverbial desk drawer for years. Perhaps it should have stayed there.
FuzzyCo grade: C
* Alright, for certain values of "pedestrian". Sure, parallel universes, magic vs. science, an army of the same person (sorta). There are some interesting concepts, but the execution is stilted.