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The Seventies were a very long time ago. It was a time of Cold War, industrial unrest, power cuts, states of emergency and economic decline. The Right were alarmed at the possibility of a coup from the Marxist Left, perhaps led by Anthony Wedgewood Benn. The Left were, in turn (perhaps with more reason) worried about the prospect of a military takeover by the Right, perhaps with Lord Louis Mountbatten being appointed as its symbolic head.

None of this news. The Seventies have been well covered in recent years, in non-fiction (such as Dominic Sandbrook’s excellent State of Emergency) and in fiction (Jonathan Coe’s The Rotter’s Club is just one example).

The era, specifically the Heath years (1970-74), do, however, provide an excellent backdrop for Ian McEwan’s latest spy novel Sweet Tooth.

Perhaps “spy novel” is a misleading term (although it definitely is one) as this has a more…