Doggy detective King and his analytical human sleuthing partner, Kayla, come to the aid of frightened friends at a sleepover in this tenth series installment. Jillian and her puppy, Thor, are freaked out by a "big dark blob" that makes an ominous "Wooooooo!" noise and appears to reside in their basement. While Kayla methodically lists known facts and riddle-like questions ("Why do we only see the ghost at night when the lights are off but we can hear it anytime?"), King sniffs out clues, including some red herrings. Through problem-solving and teamwork, the pair sheds light on the shadowy mystery. King's enthusiastic narration is peppered with funny asides ("If I could write, I would add this") and lots of personality ("I LOVE baths. They're my favorite thing"). Meyers' digital cartoon vignettes are a pleasing blend of sweetness, humor, and a touch of suspense. Beginning readers will enjoy the fast-moving plot and unexpected twists.