The sweet science of nodding off - or not

The Secret Life of Sleep

**By** Kat Duff

**Oneworld,** €16.35

**Reviewed by** Brendan Daly

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At the beginning of April 1865, the White House echoed to the wails of sobbing mourners. In the East Room, grievers surrounded a corpse wrapped in funeral vestments, its face covered. Inside the coffin lay the US president, killed by an assassin's bullet.

When Abraham Lincoln told his wife and bodyguard about his dream described above, they reassured ...