Ohhhh The Last Unicorn! Yes, I totally should reread that as well...one day. I think I last read it in my very early 20s.

I think I picked up RJB's Foundryside and then put it down because I was missing some sort of prequel(? something with Glass?). I did read his City of Stairs trilogy and liked City of Stairs quite a lot but didn't warm to the sequels, so for me he's a bit of a mixed bad as an author. I want to like his stuff but at least with Foundryside I got confused.