Rules for ghosting
A.J. Paquette
Joined by a living boy whose family has recently moved into the house she haunts, Dahlia, a twelve-year-old ghost, tries to solve the mystery of her own death while fending off an unscrupulous ghosthunter.

by Sylvia Peck (1989)
While entranced by the seals that swim off the shore of the Maine island she visits during holidays, sixth grader Molly befriends an interesting girl her age who seems different from other humans.
A.J. Paquette
Joined by a living boy whose family has recently moved into the house she haunts, Dahlia, a twelve-year-old ghost, tries to solve the mystery of her own death while fending off an unscrupulous ghosthunter.
Emily Rodda
The walled city of Weld is under attack from ferocious flying creatures that raid in the night, bringing death and destruction. The Warden calls for Volunteers to find and destroy the Enemy who is sending the invaders. The heroes of Weld answer the call one by one, never to return. Rye is officially too young to go, but his brothers are among the lost, and he must find them.
Robert Bright
Georgie the ghost overcomes his timidity just enough to scare away the robbers who are stealing Mr. and Mrs. Whittaker's antique furniture.
Robert Cormier
IT IS THE summer of 1938 when young Paul Moreaux discovers he can "fade." First bewildered, then thrilled with the power of invisibility, Paul experiments. But his "gift" soon shows him shocking secrets and drives him toward a chilling act."Imagine what might happen if Holden Caufield stepped into H. G. Wells' The Invisible Man, and you'll have an idea how good Fade is. . . . I was absolutely riveted."--Stephen KingFrom the Trade Paperback edition.