I used to believe that every book has an objective value. And I used to believe that this value is fixed and universal.
Now, I believe it’s much more useful to say something in this form: this book has this value to this person in this context.
I absolutely agree. Everybody should be comfortable abandoning a book. A book should bring something for you to the table. Not for other people. Everybody has a different context for a book. Contexts might overlap but most of the time they don't.