time-travel fiction

"This time, the X-Venture Xplorers' are in the Permian - Carboniferous eras, around 350 million years back. Many creatures which are small today were very big back then-- which presents a big problem when the X-Venture Xplorers come face to face with things like giant spiders! Even more big dangers from today's small creatures await the team as they quickly realize that it is a bad idea to be playing in the Permain!"--Provided by publisher.

"Londons fall and kingdoms rise while darkness sweeps the Maresh Empire, and the fraught balance of magic blossoms into dangerous territory while heroes struggle"--OCLC.

"Excellence siblings John and Sarah barely made it home last time, but in their next time traveling adventure the challenge really heats up. Surrounded by clashing cultures on the ancient Roman frontier, they must fulfill their quest to unite the emperor with his enemy, an Alemanni barbarian, or risk being stuck in time forever"--OCLC.

"Exploring a mysterious cave in the mountains behind their house, John and his sister Sarah are shocked to discover they've time traveled to ancient Egypt! Now they must work together to find a way back home from an ancient civilization of golden desert sand and a towering new pyramid, without parents to save them. The adventures abound--cobras, scorpions, a tomb robber, and more! The two kids have to trust each other, make friends who can help, and survive the challenges thrown at them . . . or be stuck in ancient Egypt forever"--Amazon.

After sixty years of trying to stop Paradox and set the universe right again, Finn time-travels to get help from his nine-year-old self.

"Xavier, Brad, and Yadina are off on a fossil hunt with paleontologist Mary Anning! She helps them learn that when you start something it feels good to finish it"--Back cover.

". . . [follows] the adventures of Arthur and his imaginary friend, Bun-Bun. Together they travel through the Temple of Dendur at the Metropolitan Museum to another time and place and befriend the lonely boy king, Tutankhamun"--Adapted from publisher description.

A young African-American woman is mysteriously transfered back in time leading to an irresistable curiosity about her family's past.

"The magic tree house whisks Jack and Annie away to Greenland where they discover they've traveled back in time to meet Lief Erikson"--Provided by publisher.

"Jack and Annie are whisked back in time by the magic tree house to meet Benjamin Franklin in Old Philadelphia"--Provided by publisher.