How old was the youngest new york times best-selling author?

The youngest new york times best selling author was just 12 years old.

Explanation: Jake Marcionette released his debut book, Just Jake, a loosely autobiographical, laugh-out-loud comedy adventure.  With that book, Jake made history in two ways: the youngest author to hit the New York Times Bestseller list and the youngest author in the history of Penguin Books to land a publishing deal.

obama was told in early july 2004 that he was chosen to deliver the address, and he largely wrote the speech himself, with later edits from the kerry presidential campaign.