The Separation

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The Separation is a 2002 novel by Christopher Priest. It is an alternate history revolving around the experiences of identical twin brothers during the Second World War, during which one becomes a pilot for the RAF, and the other, a conscientious objector, becomes an ambulance driver for the Red Cross. The author introduces a deliberate confusion by giving these brothers identical initials – J.L. Sawyer – one known as Jack and the other as Joe.
Multiple histories – at least two, and on some readings many more – are presented, with different roles and fates for the various characters. The novel abounds with plays on the uncertainty of identity not just between the twin brothers, but also that of Winston Churchill and, crucially, Rudolf Hess, Hitler's deputy, who flew to Britain in 1941 claiming to have a peace offer from Hitler.
The novel also utilises a favourite technique of Priest's, that of the unreliable narrator.