Am I a Linchpin?

I am reading the book "Linchpin" by Seth Godin. His writing style does not keep me riveted, but it is a fairly easy read.

The book is very interesting to me, but I am constantly wondering if I have what it takes to be indispensable. Can I be a linchpin? I think I have a lot of knowledge that makes me very valuable to my company. I just don't know if I can be a linchpin.

I don't know how to be a linchpin yet. That much I do know. I need to figure that out.