Keystone Passage by Catherine Quinlan

https://thebookvoice.com/podcasts/2/audible/210901 to listen full audiobooks. Title: Keystone Passage Author: Catherine Quinlan Narrator: Catherine Quinlan Format: mp3 Length: 1 hr and 39 mins Release date: 07-18-23 Ratings: Not rated yet Genres: Time Travel Publisher's Summary: Cliff, Monty, Shandra, and Quisha’s summer visit to Grandma’s turned out to be more interesting than they had anticipated. An unexpected find transports them to ancient and modern Africa where they meet indigenous Africans and make new friends. However, they must then find their way back home. They use their knowledge of science and history to return to Grandma's.