space and time

Even though wizard Stanislaus Pym said they would be safe at the Edgar Allan Poe Home for Hopeless and Incorrigible Orphans, Kate, Michael, and Emma are soon found by their enemies, and now the race is on to find the next of the Books of Beginning, the book of fire, before it can fall into the wrong hands.

Sera must struggle to unlock a secret hidden deep in her brain, the only hope of saving her boyfriend Zen from a mysterious illness, before the Diotech scientists that created her silence her to prevent the secret from getting out.

At nearly fifteen years of age, Joey Harker learns that he is a Walker, able to travel between dimensions, and soon joins a team of different versions of himself, each from another dimension, to fight the evil forces striving to conquer all the worlds.

A defective time-jumping device strands Theodore, a teen from the distant future, in the twenty-first century, where he is helped by Jules, who has his own time problems, and Gen, an old friend.

While visiting York, England, a young American, already troubled by family problems, is assailed by strange feelings of dread whenever he approaches some of the ancient landmarks of the city.

Beset by an enemy from within, Dan searches for the gypsies he once knew in York and is led inexplicably into a calamity involving the Black Death in a hostile country among frightened and superstitious people.

Rescued from imminent death, teens Maddy, Liam, and Sal join forces in 2001 Manhattan to correct changes in history made by other time travelers, using a "time bubble" surrounding the attack on the Twin Towers to hide their journeys.

A teenage brother and sister are transported back in time to 1955 when their own parents were teenagers.

After several days of strange events, Conrad Schwartz is convinced he has been stranded in 1231 A.D. Poland. He must turn medieval Poland into a powerful country or the Mongols will destroy it in just ten years.

When demons begin appearing on Earth unpredictably, foreshadowing a cataclysmic breakdown of their magic, Artemis and his friends face a new foe--a twelve-year-old girl whose intellect just might match Artemis's own--as they try to prevent catastrophe.