Can A+ images include prices, reviews, or promotional claims?

No. Amazon's A+ rules prohibit prices, discounts, review quotes, star ratings, "bestseller"/award claims, time-sensitive language, shipping claims, and contact info or external links. Including any of them gets the content rejected.

Stick to describing the book and the reading experience — the premise, what's inside, who it's for, and your other titles — and you'll sail through review. See Why does Amazon reject an A+ image?