Writers of memoirs are often praised for their honesty — but how do we know? I found I did believe Frances Stonor Saunders for readily admitting her ambivalence towards her father, who died in 1997 of Alzheimer’s. She is ‘secretly furious’ with him for ‘not telling his story’. But when his suitcase — almost certainly containing revealing documents — is handed to her in a church car park in 2011, she baulks at opening it and puts it first in her mother’s attic (her parents divorced when she was eight), then in her uncle Peter’s, where it stays for the...