The Grid began life as a short pitch for The Big Idea competition.
It grew out of The Secret Bunker Trilogy and was a development of something that happened in that story.
The Grid is a development of the area where Simon and Kate have their final fight in space in Regeneration.
There's a reason for that, by the way.
The two trilogies are linked, and there's a third series of three stories to come.
Eventually both trilogies will link up … there are many things that link the two worlds.
If you look really carefully, you'll spot them 🙂