It may seem perverse to express nostalgia for a category of mental illness, but many sufferers, as well as some psychiatrists, regret the passing of "manic depression."

STRICTLY BIPOLAR, by Darian Leader. Penguin, 2013, 112 pp., £5 (paperback)

My brother, Archie, was diagnosed with the condition in the 1980s, the decade the American Psychiatric Association formally rebranded it "bipolar disorder," but he was not alone in disliking the newer term, even as it was adopted by his British psychiatrists. He resolutely continued to call himself a manic depressive.