You are refusing to live in reality. You have been shown and told in many different ways by him that he doesn't want to deal with you. You are claiming this latest contact is about the book but really the book is a minor thing and you are trying to emotionally blackmail him into being with you. If he returns the book, great. If not, you'll have to deal with it. Stop contacting him. Using the old texting app to contact him because you're blocked everywhere else is weird and stalkerish. Stop doing that.