Reader with absolutely no ads

As title says. I'm in the market for an e-ink reader with no ads whatsoever. No lock screen ads, no "recommended" section, etc. They drive me up the wall. I just want to unlock it and go right back to reading. I have all my books as epubs so no store is not an issue.

Otherwise:

-Under 10" (for reading in bed)

-under $200 ideally

-no other features (pen, color, audio, Android, etc.) needed

-battery life and dpi/text quality is a priority

Have others had any luck with PocketBooks?