Report on Probability A was a novel I never finished as a teenager. Might track a copy down again - it is a formalist experiment as far as I can find out.
Getting your head around it could be seen as a challenge.
The only book I put aside without finishing (Downbelow Station by C.J.Cherryh) was recommended to me again years later and when I did pick it up I found it gripping.
I really recommend you try Report on Probability A again, it was one of the best books I ever read!
Getting your head around it could be seen as a challenge.