The reading lists this book is on, on its product page

Reading lists are curated sets of products. On any product page, show the reading lists that include this book, so a shopper can find more like it.

The list

In the app this list is called Reading lists featuring this book.

What it says

Take every Reading list. Per product, through the Books field: for each product, keep the reading lists whose Books include it. Sort by Name, A to Z.

On the storefront

The app writes one metafield on every product that appears on at least one reading list, product.metafields.lists.reading-lists-for-book, holding those lists. Products on no list get no metafield, so a bound block renders nothing there. In the theme editor this metafield appears as a dynamic source on any block that accepts a metaobject list; no Liquid needed.

In your store

Any type with a product reference or product list: bundles that include this product, recipes that use this ingredient, lookbooks that feature this item, compatible accessories. Conditions still apply if you add them; the per-product part only decides where the result is written.