Finn and Erin Blackwell visit the quite Scottish hamlet of Ping during their summer holidays. They soon embark on an adventure that takes them into a different world, a world where Lethavian, The Dark Spirit, protected by the Purple Crystal, rules supreme. Befriended by Willie and Cameron McDougal they embark on a quest to destroy Lethavian before he destroys them, and their world. Aided by Theodore, brother of The Dark Spirit they encounter a succession of dangers. Their every move is watched through the eyes of large raven-like birds, Black Hammers, who feed their information to their master, The Dark Spirit. They come up against and battle with Lethavian's foot soldiers, Mudthogs, a fluid creature with the ability to reform severed limbs, and their minds are tormented by Shadow Demons. On reaching Sirius a community of Shellac join forces with them, led by Narabius, their wise elder. Narabius talks directly into the minds of his Shellac race, guiding them into battle. They destroy Vandor, the fire dragon on their journey. Finally Lethavian's inner-evildom is breached, where with cunning and bravery he meets his match. The Purple Crystal is parted from The Dark Spirit, and given to Narabius for safe keeping, and Lethavian is rendered into obscurity, for now! To visit the Ravenhall website, www.ravenhall.net