This is a book I am going to come back to one day. I tried it in 2006 and found it so intriguing yet frustrating as it's arhythmic repetition was disorientating and, looking back, a complete mystery to me.
Written in 1937, the novel deals with a painter, drugged up as I recall, who sees all these strange images in his work. No doubt it was some disguised representation of Persia - I really don't know - but as I read it, passages were identical, the same images came round and round again. A real headspin of a book. You can read it
here.