The job requires him to work unnoticed, even in plain view, so Jon Favreau settles into a wooden chair at a busy Starbucks in the center of Penn Quarter. Deadline looms, and he needs to write at least half a page by the end of the day. As the espresso machines whir, Favreau opens his laptop, calls up a document titled "rough draft of inaugural" and goes to work on the most anticipated speech of Barack Obama's life. During the campaign, the buzz-cut 27-year-old at the corner table helped write and edit some of the most memorable speeches of any recent presidential candidate. When Obama moves to the White House next month, Favreau will join his staff as the youngest person ever to be selected as chief speechwriter. He helps shape almost every word Obama says, yet the two men have formed a concert so harmonized that Favreau's own voice disappears.