I like Ian McEwan, one of the few novelists I bother to read: Saturday, Cement Garden, Amsterdam, On Chelsil Beach. He specialises in writing about how chance events can change the course of a person's life, especially in his most famous works, Enduring Love and Atonement, both made into popular films.
I've not read The Children Act yet, but I gather it centres on a judge's encounter with a young JW needing a blood transfusion and how it alters her life. McEwan is known for doing lots of research for his novels. But I gather in this novel he made some basic mistakes about JWs.