Zombie Mommy (Pals in Peril)

Our intrepid heroes are home from their Delaware crime-stopping excitement, only to discover that Lily's mom has become possessed by a menacing zombie who wants to take over the world! (Or, at least, the world of stage and screen.) Thank goodness Lily's friends Katie, Jasper, and foxy Blue-Hen-State monk Drgnan Pghlik are around-accompanied by Jasper's Astounding High-Pressure Holy Water Extruder Gun, of course-to help save the day.
 
But not before some truly scary things happen, things involving stuff like killer tarantulas, web-footed teen vampire boys, bad weather (it's a horror novel, remember?), and, well, I can't really go on. It's TOO TERRIFYING FOR WORDS!