Case of the Runaway Orangutan

Cartwright's case starts off simple enough. Miss Stonewall, from the Mutual Trust Insurance Agency, wants him to track down a missing orangutan.

The thing is, as Cartwright explains, he doesn't do orangutans. But when Stonewall offers him a large wad of cash for the job, Cartwright's suspicions are piqued.
In his search for the orangutan, Cartwright stumbles across a rare green diamond, setting off a chain of events that lands him in the middle of a tangled web of conspiracies.
From the Dirty Wars and Death Squads of Argentina, to the greatest diamond heist of the century, to a deadly virus that threatens to wipe out humanity, and to a cold-blooded assassin determined to fulfill his destiny-Cartwright's confronted at every turn, in his efforts to solve one of the most tangled and diabolical mysteries of his career.