Emily St. John Mandel 2023. Sea of Tranquility. London: Picador. 255 pp.

Billed as a time travel novel but really aims elsewhere: at the simulation hypothesis. Despite being an obvious covid lockdown project and oblivious, or simply avoiding, some basic physics (like the impact of different gravities on travellers hopping between the earth and the moon) I loved it. A simple, elegantly told yarn across several centuries. Well conceived, both the idea, the realisation, and the characters. Now to get hold of some of her other novels…