time-travel fiction

"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.

After his time-traveling deeds cause the destruction of the world by preventing Harold and George from creating Captain Underpants, Tippy Tinkletrousers tries to use his time machine to correct the situation, but it proves to be difficult to fix.

"When the magic tree house whisks Jack and Annie back in time, they land in the tallest tree in Yosemite, California where they join nature conservationist, John Muir, and US President Teddy Roosevelt on a historic trip through the woods"--Provided by publisher.