A couple of years ago in junior high I read a book that I got off of the Amazon book store. It was at the time available exclusively at Amazon. The starting scene talked about the main character (I think his name was Nate) was injured and running from a zombie. He holed up in a store and the zombie started trying to beat its way in.
Nate rummaged around and found a bottle of Mountain Dew and figured the world was ending, the glass was cracking and he was about to be eaten alive by his (former) girlfriend and he would go out with Mountain Dew and Doritos. The glass broke as he opened the bottle of soda and the zombie charged him. Somehow its mouth ended up around the bottle and it drank the soda. The soda made the zombie passive and save Nate. He recorded this with his phone and saved the world.
Some years later he was a billionaire for saving humanity and somehow got involved in a conspiracy to bring about the zombie apocalypse (2.0, this time without the sugar dependency). He spent the story trying to stop this from happening. I think the story was set in 2006 - 2011. One last thing; there was a lot of chaos caused by the issue of what to do with the now harmless zombies. Some wanted to put them in medical facilities and others wanted to just kill them. Some of Nate's friends work as doctors in a similar facility. The bad guys unleashed their new zombies on that facility and only the blonde girl survived.