Phoebe (The Delphic Oracle) and The Medallion of Gaia

Phoebe, the third to hold the Seat of Prophecy at the Temple of Delphi, and lately, the Oracle of Caral, Peru- has been given a mission- to find the missing Medallion of Gaia. The Medallion has been reported to be in the vicinity of San Francisco, in 1951. Her adventures include: a well-known detective; an Indian motorcycle; Cadillac hearses; a 1951 Jazz club; the planet Saturn; asteroids; androids; comets; a plane; a train; and ultimately a hearing room in Washington, DC Will Phoebe find the medallion? You'll find out as the book races to a startling conclusion