Based on sales for weeks ending Oct. 25 through Nov. 15, 2008

15. Obama, by Deborah Willis and Kevin Merida. (Amistad, $26.95.) Photographs capturing Obama’s 18-month campaign to the presidency.

Rankings reflect aggregated sales for the weeks ending October 25 through November 15, 2008 at many thousands of venues where a wide range of general interest books are sold nationwide. These include hundreds of independent book retailers (statistically weighted to represent all such outlets nationwide); national, regional and local chains; online and multimedia entertainment retailers; university, gift, supermarket, discount, department stores and newsstands. An asterisk (*) indicates that a book’s sales are barely distinguishable from those of the book above. A dagger (†) indicates that some bookstores report receiving bulk orders. Expanded rankings are available on the Web: nytimes.com/books.