The Seventh Dwarf (Artemis Fowl 1.5)

Mulch Diggums, a dwarf on the run from the Lower Elements Police, is trying to get his hands on the priceless Fei Fei tiara. But stealing it seems too easy. That's because it is too easy. Artemis Fowl, the legendary twelve-year-old criminal mastermind, has set him up. He needs Mulch's help...