The Time Travel Chronicles
The 6-book series features 16-year-old street-smart Madison Bryant and scientific genius, Riley Sinclair, who travel through history in a time machine.
The first trip they take, to Ancient Egypt, is a choice. The second trip, to medieval England, is to fix some timeline problems they created. But this fix creates still more problems. So they travel to the Wild West of America, then to the Caribbean when pirates roamed the seas, then to Edo Japan, with proud samurai and skilled ninjas. And, finally, they journey to the future in a bid to fix a world as mixed-up as pirate stew.
They meant to tread carefully through time. Instead, they’re leaving giant yeti-like footsteps in their wake.