Implies ‘in the box’ means that you are out for yourself. Whereas being ‘out of the box’ means you are genuinely interested in helping others. Not much more to say about this book.

book review
The Power of Nice: How to Conquer the Business World With Kindness by Linda Kaplan Thaler & Robin Koval
Success comes not only from hard work and talent, but also from being nice to others – everyone you meet is important, and it is