Being a spellgrinder's apprentice is dangerous work, and being in the cellar with magical stones, their skin acquires an eerie pale sparkle. It's practically impossible for an apprentice to escape this prison. Tommo somehow managed to break free. But his escape has attracted the interest of someone far more terrifying than the hangman.
Used availability for N M Browne's The Spellgrinder's Apprentice
February 2007 : UK Paperback