It really is good! It's my favourite of Mcintee's Master trilogy. It has an amazing group of characters in it, some you'll know instantly, but others that you'll very quickly get used to, there's even a cameo from a future companion of the Doctor's. The Inferno Universe has a few surprises in it too, one that links back to Mcintee's novel The Dark Path. Honestly, alongside First Frontier, this was one of my most enjoyable reading experiences from a Doctor Who novel.