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My first adventure into the world of horror, We Hear Voices, is published now in the US. We Hear Voices is the story of an imaginary friend that gets out of hand. Billy is six, and recovers from a deadly flu with the help of an imaginary friend, Delfy. His mother is delighted. Until Billy starts to act in increasingly disturbing ways...

We Hear Voices has spooky children, space colonisation, spiders and a secret underground hospital, but at its heart it's a family story, about how you hold things together when the world is falling to pieces around you.

Next year my fourth novel for young adults, Things to do Before the End of the World, will be published by Penguin in the UK. It's set over the course of an increasingly hot summer before the apocalypse, in Britain, Spain and France.

Olivia has always been shy. When global events take away her future plans, and a previously-unknown cousin arrives from the US, she realises she needs to seize life while she still can. But is anything, or anyone, quite what it seems?

I wrote both these books before Covid was around, but both of them are, in their different ways, about a world in which all the norms suddenly change, and about what you do when that happens.