DeadEndia: The Watcher's Test by Hamish Steele
Barney and Norma are just trying to get by and keep their jobs, but working at Dead End also means battling demonic forces, vengeful ghosts, time travelling wizards and scariest of all - their love lives. Follow the lives of the employees of a theme park haunted house, which may or may not also serve as a portal to hell, in this comedic but moving graphic novel from the bestselling author of Pantheon.