Brian only posts on the Dr Darden site, if you join the site you'll be able to access all his posts. Unfortunately he doesnt owned the rights to the zone training books anymore (there only published in Italian now).
This was the interview that got me on to his work, its a brilliant interview, he goes into a lot of detail, after i heard it i contacted him to buy the zone training DVD. http://www.highintensitynation.com/2013 ... -johnston/
Brain was also a keynote speaker at this years H.I.T resurgences event in May, i also bought this http://www.hitresurgence.com/buy-dvd
, in this he demonstrates his Tri-angler training method and lectures on how Darwin's theory on evolution ties in with training, really interesting.
Hope this helps