SBR - I do my own programs based on Joe Friel's book "The Triathlete's Training Bible." It's not hard to use but does take a lot of time and thought. You can buy prepackaged programs for various triathlon lengths at:

http://www.trainingpeaks.com/trainingplans/joefriel/

For my first attempt to qualify for IM Can I used a program form Triathlete mag called "13 weeks to a sub 13 hour IM". It was OK. It got me in shape but not as well as a custom program based on my strengths and weaknesses did.

This book also looks like it would be pretty good and it's not too expensive:

http://www.amazon.ca/o/ASIN/19313829...researcher1-20

Good luck with your training.