The Other City
It is hard to pick a favorite as they are all so different and all enjoyable. I absolutely loved Shriek and it's fascinating mushroom plagued city of Ambergris and am looking forward to the next in the series, Finch. Invisible Cities was less a novel and more an experience which I thoroughly enjoyed. Pale Fire, which purports to be a poem and critical commentary, was a fun and witty novel. I really enjoyed them all.
Thanks for hosting another fun challenge Carl!