Where did you get the idea for your most recent book?
Holdfast sprung out of a desire to write five post-apocalyptic stories. I had a few ideas already, and I went looking for less usual events that could cause problems for life on Earth (nuclear war has been done to death - pun intended).
I'd had the idea for setting a story underwater, but research suggested it's unlikely we'll build anything significant below the waves as it's too expensive. So I needed a reason to push humanity under.
There seem to be very few stories set underwater, and much less than those set in space. So it made for an interesting universe.