Language of the Birds, K.A. Merson

Arizona and her mom and Mojo thedog are scattering Arizona's dads ashes in Bodie State Park, when her momvanishes, kidnapped by the same people who say they killed her father. NowArizona must decrypt a series of ciphers that will lead a bunch of 'believers'to an alchemical secret so powerful it was hidden for the good of mankind,encoded in the legacy of a long dead president. Can Arizona get over her peopleallergy, outwit the kidnappers and save her mom?

Part national treasure style hunt, part comingof age story with so many kinds of ciphers thrown in that it may rekindle your interest in cryptography.