I nominate Quiller Barracuda
by Adam Hall, which was released as an eBook only three weeks ago at Amazon, and at a price of only $5.50.
All five Amazon reviews give it five stars.
Quiller is up against "a vast international conspiracy to use mind control to secure a Presidential election". Amazon's Product Description: "Quiller's latest field mission on behalf of British Intelligence is to discover whether a fellow British agent, located in Miami, is secretly working for another government or organization. Quiller finds himself in the crosshairs of the Florida mafia, Soviet spies and a cabal bent on world domination as he struggles to uncover the truth."