Two years ago, it was one of the hottest properties in Silicon Valley. Now the healthcare company is facing claims that its technology is flawed

Statesman who strove for unity in his nation and beyond

How an idea that began as an argument about the possibilities of German unification crossed the Atlantic and became enlisted in the cold war. Review by Duncan Kelly

The author challenges conventional wisdom on an underestimated president’s relationship with his deputy. Review by Robert Zoellick

In his account of a journey from Bavaria to the heart of power in Washington, Niall Ferguson portrays his subject as a man driven by principle more than pragmatism

Tariq Ali’s ‘The Extreme Centre’ can be read as an examination of the frustrations of the left. Review by Giles Wilkes

Son of a Flemish mechanic who advocated a ‘People’s Europe’

The former secretary of state to two US presidents calls for American leadership at a time of international disorder

Appreciations of Kissinger’s great rival laud the veteran’s visceral understanding of enduring Russian nationalism

Haris Pasovic’s promenade piece is a powerful, unremitting portrayal of division and conflict

Len Garment, legal counsel and public official, 1924-2013