In the same universe, Dreaming Void, Temporal Void and Evolutionary Void. I read the Temporal Void a year or two ago without reading the first and despite not completely understanding the story, loved it. Went back and read the whole series this year, and found it fantastic.
I found The Dreaming Void a few years ago while wandering a library desperately trying to find a good science fiction book to read - none of the suggestions I got from friends were there. I'm so glad that none of the suggestions were there.