As I said on the other thread I'm not the type to take ownership of a thread and police it but I am aware that whilst some posters are very familiar with the book, others are just starting. I'm half way through. So not sure about possible spoilers for those who are just at the beginning. My copy of the book has a long introduction which offers the following warning:
"Readers who are unfamiliar with the plot may wish to treat the Introduction as an Afterword".
So if you want to maintain an element of surprise in your reading maybe follow this thread at your own risk?