Speak outside the approved lexicon and face banishment. The exceptions are the Wordsmith and his apprentice Letta, the keepers and archivists of all language in their post-apocalyptic, neo-medieval world. On the death of her master, Letta is suddenly promoted to Wordsmith, charged with collecting and saving words. But when she uncovers a sinister plan to suppress language and rob Ark’s citizens of their power of speech, she realizes that it’s up to her to save not only words, but culture itself.

    In a few months, he’s going to die.One MissionJack needs to find seven magic loculi that, when combined, have the power to cure him.One ProblemThe loculi are the relics of a lost civilization and haven’t been seen in thousands of years.Seven WondersBecause they’re hidden in the Seven Wonders of the Ancient World.

    But she doesn't know how weird until she catches him peeling off his face -- and realizes that "Mr. Smith" is really an alien! At first no one will believe her except Peter Thompson, the class brain. When Peter and Susan discover Mr. Smith's horrible plans for their classmates, they know they have to act fast. Only they can get rid of their extraterrestrial visitor -- and save the rest of the sixth-grade class from a fate worse than math tests!