Billion-Dollar Brain
Len Deighton
 The unnamed protagonist travels to Helsinki to deliver a package after receiving instructions from a mysterious mechanically operated telephone message. On his arrival the protagonist discovers that the message was from 'The Brain', a one billion dollar super-computer owned by eccentric Texan billionaire General Midwinter. Midwinter is using The Brain to organise his own intelligence agency and private army which will soon start an uprising in Soviet-occupied Latvia in an attempt to end Communism in the Eastern bloc and tip the balance of the Cold War in favour of the West. After discovering this, and also the fact that the package he delivered contained a deadly virus, the protagonist must stop the virus from falling into the hands of both the Soviets and the madman billionaire - and prevent a nuclear war between the superpowers in the process.