The world's leading AIDS researcher has been brutally murdered in Edinburgh on the eve of a world-shattering announcement. What did he know that made him a target? If anyone holds the key to the secret he carried to his grave, it is Margaret Kreiser, his former lover and research associate. James Macfadden, Scotland Yard inspector assigned to this case, meets with Margaret and both quickly become targets of the CIA, of corporate hitmen, drug cartel operatives, and others wanting to keep the AIDS discovery "classified." What was found deep in the heart of the African jungle will affect millions, but no one will ever know unless Macfadden and Kreiser can stay alive long enough to unlock the secrets of the rivers of the black moon.