Don't Step in the Lava! <ci> <si> <ti>

Jill’s the best miner in the village, but what happens when she takes a vacation? Dr Can Do has a worrying thought, and soon Tom and the Mage are on a special mission deep underground, chasing something tougher than iron. Rivers of lava, ancient caverns, and one very patient lesson in mining later, a strange purple stone changes everything. Will their obsidian survive the Mage’s next big question? Practice ‘ancient’, ‘patient’, ‘special’, ‘mission’ and ‘vacation’ in this fiery phonics adventure.