Greenland, Shannon The Specialists: Native Tongue, 237 p. Speak (Penguin), 2008. Language - PG, Violence - PG, Sexual Content - G. The Specialists need Gigi's math brain to unravel the hieroglyphics in an ancient cavesite in order to determine which Indian tribe can actually lay claim to a vase with supposed mystical powers. Her cohort on the mission includes Parrot, who has secrets that connect him to one of the tribal chiefs, a chief with a streak of viciousness. Of course the groups lives will be in danger somewhere along the way. I think the Specialists is a great filler series for kids who like spy novels, but aren't up to Michael Crichton. Its not squeaky clean, but they are riddle filled and action-packed. This is the fourth book in the series. MS - ADVISABLE. Cindy, Library-Teacher.