I've read both "The Dog Listener" and "Culture Clash". I actually liked The Dog Listener better because it had a better "tone" to it. I also enjoyed that she incorporated real life stories. I think both books have the same idea, but explain them in different ways. Personally, I think a lot more clicked for me when I read The Dog Listener... especially when she mentioned that dogs tend to go crazy when you leave them because they are thinking "where is my baby?!?!?" rather than "where is my owner?". That was a big light bulb for me. Once I get my furbaby next week I'm going to use these books as a guide for my training.
The hubby is still reading Culture Clash and hasn't read The Dog Listener yet, so it'll be interesting to see which one he likes better.