I figured it was ag3. I just bought the 2023 Redbook and checking out the prices for my coins. Of course Wizard Coin Supply upgraded to the 2024 version after I bought it.
No real difference, anyway. I only buy one every two years, sometimes 3. I got lucky with the 2023, my cousins boyfriend was selling books and one of the extras was the red book. I usually give away the old copies to kids/new collectors I meet at shops + shows.