Sure. If someone took the time to write a book about what s/he thinks, and I don't mean teaching some subject (including their experiences in the subject), or writing some other fiction other non-fiction, but rather some semi-informed garbage providing only their opinion ("What I Think About ...", "Everything I Believe", or "My Autobiography"), then s/he is a substantial amount of time on a throwaway work. This is different than responding with opinion on HN, etc. because it isn't a discussion where they might actually engage someone else; it is a one-way conversation. Now if they wrote a wise work of art and is marketed correctly or widely popular, I might reconsider, but that probably isn't the case. I don't want someone who wrote a book like that and flaunting it in conversation working for me, because unless they are applying to a position as an editorialist, I don't want to read their diatribe emails or listen to soliloquies about their feelings on various subjects while at work, I want them to get their work done.
Why is a resume that shows understanding of the business important? Because it shows that they are focused on what is important to the work and relaying that information, rather than their opinion.
Good eye--806v bookshelfs. I picked mine up on Craigslist for half off, and would highly recommend anyone else to do the same. Listening to music is an entirely new experience in hi-fi (I'm new to this).
