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4-6Genius Files series.
Twins Coke and Pepsi McDonald, secret government agents, continue their road-trip adventure to the weirdest and strangest sites in America, this time traveling through Texas while again outwitting their enemy pursuers through a series of codes, ciphers, and hidden clues. Photos and Google map tie-ins provide information on the actual tourist stops. A fourth fun-filled mystery adventure with hit-or-miss humor.