Time Twisters

Luis, Casey, Tyler, and robot cat Steel discover Tesla's Time Twister, a time machine created by the famous scientist and Luis's uncle. Immediately, they're off on adventures, exploring the past and the future. They face aliens in space, a haunted house, ancient Egypt, and a monster-filled undersea world as they attempt to rescue Uncle Cyrus, who has been lost in time for more than one hundred years!

Full contents:

Book 1: “Time and Space”
Book 2: “Haunted Time”
Book 3: “The Curse of Time”
Book 4: “Time Under the Sea”