Hi Blurbette,
Welcome to Apple Support Communities. It looks like you're getting recommendations that don't suit your needs. We will be happy to assist!
If you haven't already, have a look at Apple's privacy section for Books
Apple Books & Privacy
We use your interactions with Apple Books to help you discover the content that’s most relevant to you. For example, we recommend content that we think will be of interest to you based on what you’ve previously searched for, viewed, downloaded, updated, or reviewed in the stores. We also use your purchase history and payment methods together with account information derived from your Apple ID. You can turn off personalization features in the App Store, Books Store, and iTunes Store by turning off Personalized Recommendations for your Apple ID. On iOS and iPadOS, go to Settings > [your name] > Media & Purchases, and then tap to turn off Personalized Recommendations.
It looks like you may be able to turn off the personalized recommendations. If you do, and turn it back on, it may reset what you're seeing.
We hope this helps!
Cheers!