Edison Beaker, creature seeker

After escaping evil Baron Umbra and other creatures of the Underwhere, Edison Beaker and his young sister, Tesla, are safe at home. But when their friend Knox needs help on the other side of the Night Door to help a city sinking into darkness, Edison Beaker is about to find out if he has what it takes to be a Creature Seeker! In graphic novel format.

"Siblings Edison and Tesla Beaker travel through the Night Door once more to save a mysterious city that is sinking into darkness"--OCLC.

[Book 1] In this graphic novel, Edison Beaker believes his family is so boring since they run a pest control company. But when he and his younger sister tag along with their uncle on an emergency call, he discovers the family business fights much larger critters than your average insect or rodent.