I don't know. It's great that you wrote it and I can completely understand what sort of undertaking it was, but the problem with any mentoring book is that it should come from a recognized and credible source. If this were an auto-biography book, written from the "what worked for me" angle, it would certainly have an audience. But if it just dispenses advice, then it begs the question what makes you think you are in a position to do that.

I am also not sure who it is written for - pretty much every developer above summer intern thinks of himself as a senior :) Over-inflated self-assessment is a norm.