Keeper of the Earth

Having found the Board of Fire, Jenna and Simon hurry to decipher the clues that will lead them to the Board of Earth--and mastery over the very land itself. But on their way to locate the tomb of a mythical English hero while fending off shadowy new attackers who want the Boards for themselves, an offer of help comes from a surprising source. Can Jenna and Simon trust this offer--or are they walking straight into a trap set by the one who has coveted the Boards for millennia?