The Ravenstone: The Secret of Ninham Mountain
by Diane Solomon & Mark Carey
Top 1 % Goodreads reviewer Dianne Bylo gives 5 Stars and exclaims, "simply magical!" 13-year-old twins discover an exquisitely carved stone artifact, the Ravenstone, and at the bidding of a mysterious old shaman, they embark on a harrowing quest across centuries. They must depend on their courage, their faith in their friends, and luck. Or is it destiny?