Recommendations for halfway discussion point for this book

[Jim]

Haven't finished reading this yet, but my book group is trying to pick a point where we could meet halfwayish through the book and discuss our predictions, etc.

Should we meet at the end of book 1? Go a few chapters into book 2? Trying to avoid spoilers if possible so I don't ruin it for myself or the rest of the group.

Any recommendations are welcome. Thank you!