Does the book cover Core Data with Combine?
There is one 8 page section in the last chapter on using Core Data with Combine.
This book is about Combine specifically, Core Data is a large topic in itself (and raywenderlich.com has a separate book about Core Data). That said the Combine book has a short chapter covering the Core Data integration with Combine and additionally the final project of the book in the last chapter uses Core Data as well.