Counterfeit millions flood the U.S. economy! A Master Plot! A Mexican political party is demanding the territorial return of Texas...and New Mexico...and Arizona...and California... A Chinese paper factory is exporting a fine engraver's surface for the familiar five-dollar portrait of Abe Lincoln. A Countess who's made a fortune in cosmetics is running s strange little kingdom deep in the Mexican jungle. A mysterious and very lethal pill has been delivered to one Nick Carter:Rx, suicide!
Used availability for Nick Carter's The Golden Serpent
March 1969 : UK Paperback
1967 : USA Paperback