This is the first / pilot(?) episode of the London Town series which introduces us to Jackson Rockstone, a physicist / scientist who discovers lots of parallel universes, but takes interest in one of them.
The word that springs to mind whilst reading this was "fast-paced". I've no idea where this is going, but this short episode (again with a ?) sets the scene.
I've not read Damien's fantasy novel, but he certainly knows how to ramp up the tension. This story finishes with a monstrous cliff-hanger, but knowing that this is the start of many stories, I think that Jackson might be OK. But what do I, the reader, know? Hahaha,