The sixth book in this popular full-color chapter-book series, a great fit for fans of Netflix's Wednesday and readers who enjoy a mix of humor, adventure, and a touch of the macabre Crumbling Manor is all a-tizzy with glee as everyone prepares a party to die for to celebrate the return of Ghoulia's parents! Snooping through her grandmother's closet for a pretty outfit to wear, Ghoulia finds an old, beautifully crafted bracelet . . . which happens to unlock a hidden stairwell in the library! Led to a locked door that can only be opened by solving a riddle and finding the door's mysterious "heart key," Ghoulia, her grumpy cousin Dilbert, and her wise greyhound, Tragedy, start their search for the missing key. As clues start piling up, Ghoulia and Dilbert learn of their missing Auntie Acid. Suffering through a tragic heartbreak, their aunt left the manor many years ago and never returned. Detective senses tingling, Ghoulia suspects that their long-lost aunt may hold the "heart key" that unlocks the secret sealed door. Gathering up their courage and wits, Ghoulia, Dilbert, and Tragedy leave the manor and embark on an adventure to find and bring Auntie Acid home! But will they be able to track her and the key down? Or will their sleuthing reveal too many secrets the zombie family wanted to keep locked away . . . forever? Ghoulia and friends return in the sixth book of this ghoulishy good, full-color, Tim Burton-inspired chapter-book series, starring everyone's favorite, not-so-scary zombie.