Keep the passages you marked.

Apple Books, Kindle, Google Play Books, and PDFs — one private library on this Mac. All highlights in one place.

Local-only — private library on this Mac; no account, nothing uploaded
Import highlights from Apple Books, Kindle, Google Play Books, and PDFs you drop or choose
Browse and search one list — groups by source, color, author, and day
Preview a quote in a window, or export Markdown — File → Clear All removes only this app’s library