This set includes five tales of extraordinary heroism, marvelous intrigue, and exceptional courage that have inspired and amazed people for generations.

It was 1798 when the Morningstarr twins arrived in New York with a vision for a magnificent city: towering skyscrapers, dazzling machines, and winding train lines, all running on technology no one had ever seen before. Fifty-seven years later, the enigmatic architects disappeared, leaving behind for the people of New York the Old York Cipher - a puzzle laid into the shining city they constructed, at the end of which was promised a treasure beyond all imagining.

This is a story of things that are not possible. It's not possible for Amy to see spirits. (She does.) It's not possible that Amy and Moo can communicate using only their minds. (They do.) It's not possible to time-travel. (Yet.) And it's definitely not possible that witches exist. (Seriously?) None of these things are possible. (Until now....)

With a dad who disappeared years ago and a mother who's a bit too busy to parent, Emmy is shipped off to Wellsworth, a prestigious boarding school in England, where she's sure she won't fit in. But then she finds a box of mysterious medallions in the attic of her home - medallions that belonged to her father...who may have gone to Wellsworth.

Will Everett has always wished for an adventure. Little does he know his adventure starts the moment he boards the Boundless. There is a murder, and now Will protects a key that can unlock the train¹s hidden treasures. Villains are fast on his heels and strange creatures are lurking outside the windows, as the Boundless hurtles across the country. Together with Maren, a gifted escape artist, and Mr. Dorian, a circus ringmaster with amazing abilities, Will must save the Boundless before someone else winds up dead.