Gate of Ivory, Gate of Horn (Mythago Wood)

A gifted scientist was documenting the wild and ancient world of Ryhope Wood until he disappeared into that vast forest. Now his eldest son attempts to find him by using his father's own journals, but is soon distracted from his search by unexpected feelings for a mysterious Celtic warrior-- a heroine who is none other than the key to the mystery of the universe. Now both father and son are caught in a fateful relationship in and through the forest and the legendary lands contained within it!