Hector's Haunted House — Susan Korman

Hector and his mom are moving from their apartment into a house--their first one ever. They can't wait to make it a home. Then Hector gets a scary note, warning him that the house is haunted. Pretty soon he starts seeing and hearing things that make him want to move out forever. The Ghostwriter Team must find out who's haunting the house before Hector and his mother are driven away.