Once upon a time, when I was a child, epistolary novels such as this comprised letters from one or more correspondents, each to the other. Think Daddy Long Legs, 84 Charing Cross Road, and any number of others.
These days, of course, no one writes letters. It's all done through email. Alyson Foster's debut novel is none the worse for that.
The 107 emails are sent by Jess Frobisher to her erstwhile colleague and (we discover) former lover, Arthur Danielson. Jess is a university botany lecturer, with ongoing research into plant genes to discover their ability to withstand potential climate change. Danielson has taken off to the woods somewhere in North America to count pinecones and similarly reveal decreasing numbers of trees because of climate change.
Jess' husband Liam owns Spaceco, a space tourism business (this is a very modern novel). One March afternoon a space shuttle explodes 12 seconds after take-off, killing the two pilots and four passengers. Television and press news teams besiege Jess' home, while Liam takes off to the launch pad in Arizona to try to discover the cause of the disaster and limit the media attention.
While he is away, Jess emails Arthur almost daily, as well as raising her two children and digging the foundations for an ever-increasing greenhouse.