https://www.penguinrandomhouse.com/books/286609/dial-a-ghost-by-eva-ibbotson-illustrated-by-kevin-hawkes/
The Dial-a-Ghost Agency finds good homes for ghosts. And Fulton and Frieda Snodde-Brittle are looking for a few frightening ghosts to "accidentally" scare...
dial a ghosteva ibbotsonpenguinrandomhousecombooks