Steve and his friend Max use their time machine to return to the richest, roughest boom town in the old Wild West where they pursue Gentleman John Hooten, the Rhyming Robber of the Rockies.
Zoe discovers that her house is occupied by the ghost of an eleven-year-old girl, who carries her back to the day of her death in 1870 to try to alter that tragic event.
Twelve-year-old twins Felix and Maisie choose to stay with their mother when their parents get divorced and move into the attic of a historic mansion in Newport, Rhode Island, where they discover a hidden room filled with secrets.
Chicago sixth-graders Jack and Ruthie return to the Thorne Rooms at the Art Institute of Chicago and once again go back in time while trying to stop an art thief from endangering the miniature rooms.
While Alex is getting to know his inventive neighbor Herbert they unexpectedly travel to the twenty-second century through a space-time wormhole where they encounter aliens, jet packs, and their future selves.
In Paris with his parents to sell family heirlooms, fourteen-year-old Greg Rich suddenly finds himself four hundred years in the past, and is aided by boys who will one day be known as "The Three Musketeers.".
Princess Emma is determined, with the help of her favorite bat, Li'l, and some long-long ancestors to reverse the curse put upon her lineage by an angry fairy.
While visiting her grandmother's log cabin, Liz encounters the ghost of her great-great-great grandmother and suddenly finds that she has been transported back in time.
