Demonkeeper Series by Royce Buckingham

Ever since his mentor?the original Demonkeeper? mysteriously disappeared, Nat has been in charge of the demons that live in his house. Most of them are just nuisances, but the Beast who lives in the basement is very dangerous. When Nat goes out one night, a clueless burglar breaks into the house and unwittingly sets the Beast free. Meanwhile, a vicious villain, the Thin Man, wants to use the Beast for his own evil purposes... moreEver since his mentor?the original Demonkeeper? mysteriously disappeared, Nat has been in charge of the demons that live in his house. Most of them are just nuisances, but the Beast who lives in the basement is very dangerous. When Nat goes out one night, a clueless burglar breaks into the house and unwittingly sets the Beast free. Meanwhile, a vicious villain, the Thin Man, wants to use the Beast for his own evil purposes. Can Nat defeat the Thin Man and return the Beast to the basement without any major casualties? less

There's a Troll under the bridge, a Wedge causing earthquakes, Char that's burning through town, and they're all demons on the run. As the mayhem escalates, Lilli, a hippie Demonkeeper arrives on the scene. Her interest is in peaceful demons but something dangerous is stalking the Seattle streets. Can Nat, Sandy and Richie see past their differences to find the Demoneater that is threatening to destroy the panicked demons? Mr... moreThere's a Troll under the bridge, a Wedge causing earthquakes, Char that's burning through town, and they're all demons on the run. As the mayhem escalates, Lilli, a hippie Demonkeeper arrives on the scene. Her interest is in peaceful demons but something dangerous is stalking the Seattle streets. Can Nat, Sandy and Richie see past their differences to find the Demoneater that is threatening to destroy the panicked demons? Mr. Calamitous seems to know something, but a ravenous Demoneater could end it all. Nat may be in over his head. less

The demons have been released and have taken over the city. They are in the library, the dump and even the water. Nat is trapped at sea and his friends must use their wits to recapture the escaped demons. The Demonkeeper Journal may hold some clues if only they can be translated in time. Richie, Sandy and Lilli are a team and need to hold on until Nat gets back. The little minions step in, but when the elements collide and the chaos escalates, the destruction could be complete.