https://www.theguardian.com/business/2020/oct/27/harry-potter-publisher-covid-bloomsbury-book-sales-lockdown
A key driver has been the consumer division, which includes the Harry Potter series. There was a more than fourfold increase in profits at the division, to £2.7m, as sales rose by 17%. The publisher said print sales of Harry Potter books grew by 8% from mid-July to the end of September.