Ghost cats
Susan Shreve
Eleven-year-old Peter and his three younger siblings rediscover their lost closeness when the ghosts of their dead pet cats begin to return mysteriously.

by Rich Wallace (2003)
Frank, a teenaged ghost who has not been able to move on to a higher realm in the afterlife, tries to connect with his younger brother Herbie, a high school senior who was eight years old when Frank died.
Susan Shreve
Eleven-year-old Peter and his three younger siblings rediscover their lost closeness when the ghosts of their dead pet cats begin to return mysteriously.
Robin Pulver
When Gordon, a ghost, moves to a new school, everyone is afraid of him until they learn that he is not as scary as they thought he was.
Jacqueline Stem
While uncovering a mystery involving smuggled artifacts at south Texas's Goliad State Park, Joanna befriends an unusual boy who recounts the history of the area.
Mary Arrigan
A strange apparition that seems connected to an old sketchbook bought at an auction leads two cousins to an old abandoned house and a dangerous adventure.