Read a book during 9 to 5

When’s the last time you read a book, during 9 to 5? And not in a situation where you were searching for an explicit answer to something pressing at the moment. Also, not in a situation where someone else assigned the reading to you. When was the last time you decided to read a book to improve? Is it something you do regularly outside of work? What would make it worthwhile in a book, to read it during 9 to 5?