Market resolves to the total number of U.S. units sold (print + e‑book + audio if publisher reports; otherwise NPD BookScan print only) in the first 365 days after the memoir’s official on‑sale date.

Resolution source hierarchy:

1. Hachette (publisher) press release or SEC filing.

2. Credible mainstream outlet quoting publisher figures.

3. Credible mainstream outlet quoting NPD BookScan.

If no figure is publicly available by [on‑sale + 18 months], market resolves N/A.