I forgot how I ended up buying Possession. I also could not read it without interruptions, unfortunately. And, then I skipped some of the long poetry sections.
Having said all that, it is a wonderful read; very satisfying. May be if I read it in one go, and if I also paid attention to the poetry, I would have enjoyed it more; may be I will re-read it at some point; there is enough in the novel for several reads. There are plenty of criticisms about the plot holes on the guardian book club posts. However, as somebody else noted it is one fun read with a big heart. Strongly recommended!