Ghost in the House by Ammi-Joan Paquette (2014)
When a little ghost goes slip-sliding down the hallway, he suddenly hears...a groan! Turns out it’s only a friendly mummy, who shuffles along with the ghost, until they encounter...a monster! As the cautious explorers continue, they find a surprise at every turn — and add another adorably ghoulish friend to the count. But you’ll never guess who is the scariest creature in the house!