Green boy
by Susan Cooper

Popularity 5
Twelve-year-old Trey and his seven-year-old brother Lou, who does not speak, cross the barrier between two worlds, that of their island in the Bahamas, and a land called Pangaia, and play a mysterious role in restoring the natural environment in both places.
BrothersElective MutismFictionScience fictionEnvironmental protectionSelective mutismNew York Times reviewedJuvenile fictionMutismEnvironmental protection, fictionChildren's fictionFantasy fiction