This is a before the title page front matter. It includes blurbs and other hype:

I love this book so much. It changed my heart and my life.
— OP Nusrat

Other people rave about the book:

If I could give this 15 stars, I would. It’s a constellation. A brilliant diamond. A horse roaming through the pasture with wind blowing through its glorious mane. I’d eat this book for dessert if I could. It’s gluten-free.