SOLVED. YA, time traveler showed up and saved three people from dying and then took them to current time. [s]

[Taylor]

It was a young adult book. A time traveler showed up and saved three people from dying and then took them to current time, i want to say one of the people he saved was from the twin towers). He trains them to take over for him and become time traveler's of their own to go back right any wrongs done to the timeline.

[Lobstergirl, au gratin]

Moved to Unsolved.

[Sam]

The Time Riders by Alex Scarrow, maybe?

[Taylor]

That's it. Thanks

[Kris]

Glad you found your book, Taylor. Here's the link for Sam's find - the first book in the TimeRiders series - TimeRiders by Alex Scarrow.