At long last!
It's weird and very flattering to see characters that I've only really had in my mind portrayed in, er, 2D, and not as the stick-people I would draw. It also makes me realise how vague some of my ideas on what they look like are. I've always thought "A bit like Kate Bush meets Deanna Troy, but occasionally with dreadlocks" but I've never quite figured it out. Luckily there's Google image search. It's a tough life, being an author.
I looked up the artist's website and it appears that, as well as other books, he drew the posters for the musical of Bat Out of Hell! That's quite a strange connection!