The Night Door (Edison Beaker, Creature Seeker book one) has strong 7 to 10-year-old boy reader written all over this. There is potty humor (the pun of humans wear underwear/and they go to the Underwhere world), funny monsters (a possessed by darkness giant cat that likes to chase the light of the flashlight), great (mostly great) hero and his sister (who is pretty spunky, has a cool pet hamster, and like her brother, not keen of the dark)! Girls will enjoy as well if they are into offbeat humor.
Frank Cammuso most likely wrote this book for himself. He wanted a book about monsters under the bed, in the closet and behind secret doors. And just because the rest of us can get a kick out of it too, is bonus. The graphic novel format makes it seem easy reading, but there is a lot going on. The full-color, quirky art, tells as much of the story as the text. And while, as an adult, there were a few plot-holes, or pieces of information missing, I am sure I picked up on a few of the clues kids might miss. This could be read by an adult as there is sophistication to the slap-stick humor.
For the adult most of the humor and points will be obvious, it is a quirky, goofy read for the Diary of a Wimpy Kid series, a few steps up from Magic Tree House and anyone who enjoys a stereotypical fantasy, monster hunting/finding family secrets story.
And if there is one thing this book taught me is, do not go into the Underwhere without your torch, I mean flashlight, and do not miss this series.