An Angel for May by Melvin Burgess.
Tam travels back in time to his small English town at the time of World War II, where his friendship helps a traumatized girl living on a farm just outside the town.
Blossom Culp and the Sleep of Death by Richard Peck.
Blossom, high-school freshman and possessor of "second sight," helps an Egyptian princess, dead for 3500 years, to regain her tomb, and in
addition saves a suffragette school teacher from losing her job in 1914.
A Crack in the Line by Michael Lawrence.
Sixteen-year-old Alaric discovers how to travel to an alternate reality, where his mother is alive and his place in the family is held by a girl named Naia.
Elizabeth, Elizabeth by Eileen Dunlop.
Sent to spend the summer with her aunt at a 200-year-old Scottish
mansion, a young girl finds herself going back in time to the eighteenth century and becoming another person.
Twilight by Meg Cabot.
California teen, Suzie Simon, is a typical high school student except
for the fact that she is "shifter" who can mediate between the living
and the dead, and she is in love with a ghost from the nineteenth