"Better Than His Book"

I've been looking at a lot of portfolios lately,* and I've heard the same phrase about five times this week. Someone has sent me a book on behalf of someone else and commented, "They're better than their book."
I don't know what to do with that. I totally trust the people passing these books on to me, but I can't help but ask why the person's book isn't as good as they supposedly are. "They're better than their book" is like saying "Our product is better than our ads make it seem."
Your book represents you. It represents the way you think. So if your book isn't as good as you are, you'd better get to work on making it better. If you're not getting the opportunities, do something on the side. Give yourself some fake assignments. You're competing with people whose books are probably better than they are. That's the reality of the situation.
If your book isn't as good as you are, then your book could be better. So why isn't it?
*We're hiring all creative levels. Drop me a line or send me your stuff if you're interested.