Sam Tanenhaus is the editor of The New York Times Book Review, a position he has held since March 2004. Mr. Tanenhaus also contributes periodic columns to the Arts & Leisure section. From December 2007 to March 2010, Mr. Tanenhaus simultaneously held the position of editor of the Week in Review. Mr. Tanenhaus had previously worked for The Times from 1997 until 1999 as the assistant editor of the Op-Ed pages. He has also written for the Book Review and the Op-Ed page, as well as Arts & Ideas and the Week in Review.