Penguin Press lost its senior editor as Vanessa Mobley decided to leave her post.

According to the NY Observer, Mobley is leaving by her own choice. Recently she signed a campaign book by the New Yorker's Ryan Lizza. In 2006 mediabistro reported that she left Holt to work at Penguin as an editor of history, politics, memoir, and reporting titles.

The Observer described her many accomplishments: "Ms. Mobley, widely thought to be among the most talented 30-somethings in town when it comes to editing non-fiction, has worked with writers such as Samantha Power, Caroline Elkins, Clay Shirky, and Matt Bai."