Just before summer begins, 13-year-old Ali finds an old photograph. She recognizes the two children in it; one’s her mother, the other her aunt Dulcie - but who is the third person, the one who’s been torn out of the picture? Ali will have two months to figure it out, since she’s spending the summer with her aunt and her cousin in the same house her mom and aunt used to visit when they were kids. Then Ali meets Sissy. Sissy is mean, spiteful, and determined to ruin Ali’s summer. Sissy also has a secret. Could it have something to do with the old photo? Ali is dying to find out - though, if she’s not careful, that may be exactly what happens to her.

Jules' family moves into an old abandoned house. Her parents love it, but she's frightened and feels a sense of foreboding. When she sees a pale face in an upstairs window, she can't stop wondering about the eerie presence on the top floor - in a room with a locked door. Her fear replaced by fascination, Jules becomes determined to make contact with the mysterious figure and to unlock the door. Past and present intersect as she and her ghostly friend discover the fate of the family who lived in the house all those many years ago.

Aunt Blythe's house gives Drew the creeps-it's full of dark rooms, creaky noises, and the sound of a woman sobbing somewhere in the shadows. Then, in the middle of the night, Drew awakens to find a boy standing in his room...a boy who is Drew's exact double, except he looks as if he's come from the grave.

Against the ominous backdrop of the influenza epidemic of 1918, Elsie, the class tattletale, liar, and thief, claims the new girl at school, Annie, as her best friend. But Annie soon makes other friends as well and finds herself joining them in teasing and tormenting Elsie, who later succumbs to the epidemic and dies. Elsie is not absent from school long, though. She soon returns there as a ghost, ready to reclaim Annie's friendship and to punish all the girls who bullied her.

Twelve-year-old Molly and her 10-year-old brother, Michael, have never liked their younger stepsister, Heather. Ever since their parents got married, she's made Molly and Michael's life miserable. Now their parents have moved them all to the country to live in a house that used to be a church, with a cemetery in the backyard. If that's not bad enough, Heather starts talking to a ghost named Helen and warning Molly and Michael that Helen is coming for them.