When almost-sixth-grader Alex, a video game fanatic, is forced on a "playdate" with his neighbor Herbert, an inventor, the two travel to the twenty-second century and face off against aliens, who are not as benevolent as most people think.

Pulled through a glass that brings him back in time, Septimus Heap becomes the apprentice of an alchemist.

Life seems to be back to normal for "newly twinned" sisters Miri and Molly until their magical house sends them on new time-traveling adventures, including meeting Molly's mother in 1918 and saving two unusual soldiers during the Civil War.

Ignored by his father and sent to Derbyshire for the weekend, twelve-year-old Peter and his new friend, Kate, are accidentally transported back in time to 1763 England where they are befriended by a reformed cutpurse.

Molly Moon's hypnotic eyes give her the power to stop the world and travel through time. Now Molly makes a stunning new discovery - she's a mind reader! But can her incredible talents help to rescue her lost twin from future? And will Molly be a match for the maniacal Princess Fang and her crazy mind machine?

Children's birthdays are always strange in Willow Falls, but when Connor's little sister Grace falls into a frozen state on her tenth birthday, Amanda and Leo must travel back in time to find out what force prevented Angelina from casting the blessing that would have protected her.

When thirteen-year-olds Jonah and Chip, who are both adopted, learn they were discovered on a plane that appeared out of nowhere, full of babies with no adults on board, they realize that they have uncovered a mystery involving time travel and two opposing forces, each trying to repair the fabric of time.

Herbert, Alex, and Sammie are pretty sure their adventures in the future are over until they meet their greatest villain yet, Sammie's future self, AeroStar, a power-mad tyrant who wants revenge.

After returning the missing children from history to their original time periods, thirteen-year-old Jonah must save time itself when aviator Charles Lindbergh mysteriously appears and kidnaps Jonah's sister.

Time travelers Jonah and Katherine arrive in 1611 to rescue missing child John Hudson, son of the explorer Henry Hudson, but just as the mutiny on the Discovery is supposed to start, Jonah and Katherine's knowledge of history is tested once again, and they fear that more is at stake than just one boy's life. Author's note includes facts about Henry Hudson's explorations.