Book trilogy title

Question

What book was about a kid who was given a scroll, traveled back in time, met people, and had a real twin back in his time? It's a 3-book series. The 1st book has a purple cover and the 3rd has a green cover. Can anyone help me remember?

Answer 1

This might be The Door Within Trilogy (3 Book Series) by Wayne Thomas Batson.

The first book of the trilogy is purple and the 3rd has a green cover. There is a scroll and the boy travels into another world, perhaps time. However, I don't see any sign of him having a twin, but this is the closest to the description I can find.

Answer 2

The Secret of the Hidden Scrolls?