I didn’t know Andrew O’Hagan had Scottish roots and writes about Scotland. That puts him in the fast-lane of must-read books. The plot for The Illuminations is simple. Anne, aged 82, is losing her marbles. She’s in a sheltered-housing complex in Saltcoats. Her neighbour Maureen, aged 68, keeps an eye out for her. They’re friends, but even Jackie, the warden admits there’s only so much they can do. They’ve taped off Anne’s cooker so she can’t use...