Walker of Time

Time Travel

I read this book in 7th grade Adventure By Novel class. It is worth the money. It is not all History, there is Tag that brings lightness to the story.
Sure, it's about time travel, I'm not into time travel. But this is really good.
It starts with a boy ("Walker", hence the name of the story) that goes into a cave with a stranger, more Modern boy, named Tag, lightning strikes and they get zapped to the past. There's a bad guy, a plot twist, and travel (not "time", more "hiking"). I don't remember the Indian's tribe name, but it is a real tribe. I guess it's a story about why they left without a trace. There is a lot of Names (Indian) you have to remember though.