For sure! We already have a book in the works, which we announced in this very thorough Guardian interview by Keith Stuart:
We are deep into the planning of the first book set within the Zombies, Run! universe, and there is potential for original audio dramas that are not about you running away from zombies, but which are set within the Zombies, Run! universe.
All of these things take time and release dates are unpredictable, so we’ve been holding off on trumpeting this stuff too loudly. Also, there are only so many hours in the day that Naomi Alderman, our lead writer and co-creator, can expand the Zombies, Run! universe 😉