Advent by BringMoreLegos

Question 10

"...all at once he could see lights... the red, blue, and yellow lights that twinkled from trees in places where families created and kept memories, where they celebrated love.

....Suddenly he was aware with certainty and joy that below, ahead, they were waiting for him; and that they were waiting, too, for the baby."

This is an excerpt from the ambiguous final passage of WHAT NEWBERY-WINNING YOUNG ADULT NOVEL?