Tabitha Tumbly, Charlie Vapour, Rusty Chains and friends can't understand why the still-alives in their house are so mean.
When Pamela Fraidy gets locked in the attic by a still-alive, the ghosties are determined to make the still-alives like them.
Libris
Cartepedia
Hachette Children's Group Frightfully friendly ghosties: frightfully friendly ghosties, paperback/daren king