In the dog days of winter, when venturing out under darkened, sleety skies is to be avoided if at all possible, an online book club often seems the most appealing kind there is. Here in the UK, on territory in which the daytime TV hosts Richard and Judy once held undisputed reign, a bookish royal has entered the fray: Queen Camilla, whose ‘reading room’ and associated charity was launched on Instagram during the pandemic, and has now branched into podcasts.