Buried Alive (No Shelter Trilogy #3)
T.S. Welti

After their haven in the woods is compromised, Nada and her tribe must decide whether they want to hike all the way from California to Washington D.C. in the dead of winter with the Guardians on their tail. Nada isn't certain she wants to spend the rest of her life living in an underground shelter with Isaac, even if it means living comfortably and free of fear. Nada thinks this is the most difficult decision she has ever had to make until an even more difficult decision presents itself. Will love or shelter conquer all?