Ferryl Shayde - Book 3 - A Very Different Game

After the huge battle with a leech nest, Abel now has the key to Castle House, a big old house wreathed in lethal magic. But the key only opens the first door, leading him to the next clue. His friends want to help but the house won't let them, and even the first puzzle needs sorcerer-level magic. Luckily Abel has something up his sleeve, or rather in his tattoo! Even so, he'll need another missing key, and a way through all the other doors, before he can reach the mystery at the centre and...