B Is for Bullion — K.T. Tomb

When the ship disappears in the Sea of Okhotsk, Fiona's parole officer illegally releases her from prison so she and the Alpha Adventures team can locate and recover the missing gold. His stake in this case is personal. The catch is, the Alpha Adventurers have to act fast before anyone discovers that Fiona's on the lam. If they don't quickly succeed, she'll have to return to prison.