Russell Davis & Jenna Solitaire 
Keeper of the Earth [EPUB ebook] 

My name is Jenna Solitaire, and everything I thought I knew about myself, my family, and my future is wrong. My life is not my own. It never has been. I just didn't know it―until now…   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?