The Eye of Ra Series by Ben Gartner

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 . . moreExploring 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. less

The explosive reveal about who John and Sarah really are and why they’re traveling through time, with their most gut-wrenching challenge yet. In the time of the Aztecs, a scoundrel named Cortes arrives and the kids are forced to make an extremely difficult decision: If you could change history, should you?With more twists, more danger, and more fun, read the third book in The Eye of Ra series, People of the Sun, to find out how they handle the risk of losing more than just their lives.