Time-Traveling Teenage Heros (On Hold)

"They say nothing good happens when changing the past: secrets reveal themselves and futures are destroyed, but what if we are just doing a little saving."
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"9 teenage high school kids, most of them are troublemakers, what could go wrong with them going back in time saving people?"
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"Wait a free trip to time-travel, there has to be a price, is there like this greater villain or something?"
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Author's Note: So props to the person who designed the vortex, (the cover), and this idea and book is mine, so please no copying. But I had some influences from Doctor Who, but the ideas, plot, story line, and characters are mines. Plus shoutout to those helping me put this together, you know who you are. So yeah, go check out the book will ya?