https://www.theguardian.com/books/2019/dec/31/bestselling-books-2019

This year’s UK charts saw domestic cleaning overtake domestic noir, and women winning all the top spots in literary fiction

Almost every other year in the 2010s, an author has come out of left field and claimed the annual bestsellers’ top spot at the expense of the perennial contenders. It is either a first-time novelist going straight to No 1 (Gail Honeyman with Eleanor Oliphant Is Completely Fine last year, EL James with all her Fifty Shades trilogy in 2012), or a former mega-seller returning with a new take on their old saga (James’s reverse-angle Grey in 2015, JK Rowling and her co-writers’ script of Harry Potter and the Cursed Child in 2016).

This happened again in 2019, but with a double twist: a non-fiction title with two debut authors. Pinch of Nom by Kay Featherstone and Kate Allinson, a pair of weight-watching food bloggers from the Wirral, was always a favourite for supremacy after it broke records in March for first-week sales. The spin-off Food Planner also makes the top 50, and the pair are bound to get a third title well up the chart by the end of the year as their follow-up, Pinch of Nom: Everyday Light, came out on 12 December.