Demonfire, or, Charm of the Killing Cousin, is the fourth Sunspinners novel. As though Elaine doesn't have enough relatives at home, a cousin arrives who is willing to sell out to anyone, including demons.
Here are the first three Mudflat Magic novels in one volume,
Tyrant Trouble; Welcome to Mayhem, Baby; Barbarian Toy Boy.
"...Mudflat series is a supernatural comic romp full of non-stop action, fantastic characters and a hero you’ll love..." RT Book Reviews