Book writers who are not honest

I am a proud owner of the a great book which covers information regarding CentOs. Its published by Apress and its called The definitive guide to CentOs its a great book and worth every penny. The one disappointing thing was I wrote the author regarding some information and I’ve yet to hear from him.

Its really annoying when a technical book writer leaves his or her information in the back of the book giving the impression its okay to get in touch and when you do you never hear from them. I take my hat off to those who have taken the time to write me and to help me with my query.