I'm not familiar with *Nineteen Quiet Rooms* by Ottilie Marsh, so I can't tell you the ending. It may be a newer or smaller-press release I don't know about, or the title or author name might be slightly different. I'd rather not guess and send you into book club with a made-up twist.

Some quick ways to get the ending before tomorrow:

- **Goodreads reviews**: Filter for reviews marked as containing spoilers. People often lay out the ending in detail.
- **Search "[title] ending explained"** or "[title] spoilers." Popular book club picks often have blog or Reddit breakdowns.
- **Amazon reviews**: The 1–3 star ones frequently discuss the ending (especially if people disliked the twist).
- **Skim the last chapter or two**: Reading just the final 20–30 pages can give you the twist in under an hour.
- **Ask a fellow member**: Someone will probably happily spoil it for you.

If you tell me what happens in the part you *did* read, I can help you think through likely directions, come up with good discussion questions, or prepare things to say about the themes and characters so you can contribute confidently even without the ending.