What book is it if you don't mind my asking? I am a book addict and always open to ideas regarding therapy. Maybe your sharing the book can help others here.
Anyhow to answer your question, I've never asked a t to read a book, however I did just send an unedited first version of the book of poetry/prose I wrote to my ex t. When we first got back together after a long time of not seeing each other, I told him about wanting to write a book. He said he couldn't wait to read it. So I figured it was ok to send it to him since he originally said that and has not told me anything otherwise. That being said, it's been over a year since he has talked to me (via email). So I doubt he will ever read it or respond.