can teams be successfull in high school running the zone

I am a head middle school coach in KY. I've helped a couple of years at the high school and have been the head coach at a middle school for 3 years. We've finished 2nd in our confrence all 3 years so I've been pretty successfull so far. I'm not far from making the jump to High School and I've kind of used the middle school to develope philosophies and gain experience in pressure situations. It's great because I've really worked hard at learning more and I feel like I go into each season with a lot more knowledge than I had the year before. I look to get your ultimate passing game in the mail any day now. Which book would be best suited at learning to teach the zone? 1 Back or Lineman manual? I would love to start e-mailing you on a personal basis after I get the manual. I've communicated with you some already on the megaclinic site under the user name CoachP. I'd like to say thank you for not only helping me in the past but for being so open to so many people. I'm really excited about this site!!

What kind of things give you trouble with the inside and outside zone? Also do you ever horn block the zone?