It's "How to Win Friends and Influence People", and it's one of Paul Graham's recommended books (see http://www.paulgraham.com/startupfaq.html ), along with the Autobiography of Benjamin Franklin.
There's also "7 Habits of Highly Effective People", which is often recommended in the same breath.
I did a lightning talk a while back called "7 Habits of Highly Effective DevOps", adapting the habits and the organization of them to doing DevOps well.
Thanks. Maybe I'll try it again. I've read it once, and my memory of what I read is a major contributor to the entire enterprise seeming beyond exhausting.
Took me years to understand soft skills are as much or more important than technical skills.
(Fixed book's name)