Photo by Paul Bergen/Redferns

Metallica’s Kirk Hammett and Robert Trujillo attended photographer Ross Halfin’s book discussion In New York City.

They took questions from a small crowd about the book, Metallica: The Black Album in Black & White and also signed autographs.

The subject matter of the book is about one of the best-selling albums of all time. There’s also an accompanying deluxe, signed edition, available for a limited time.