Black ASL has long been recognized as a distinct variety of American Sign Language based on abundant anecdotal evidence. The Hidden Treasure of Black ASL, originally published in 2011, presents the first sociohistorical and linguistic study of this language variety. Based on the findings of the Black ASL Project, which undertook this unprecedented research, Hidden Treasure documents the stories and language of the African American Deaf community. With links to online supplemental video content that includes interviews with Black ASL users (formerly on DVD), this volume is a groundbreaking scholarly contribution and a powerful affirmation for Black Deaf people. This paperback edition includes an updated foreword by Glenn B. Anderson, a new preface that reflects on the impact of this research, and an expanded list of references and resources on Black ASL. The supplemental video content is available online at the Gallaudet University Press YouTube Channel. Under Playlists, click “The Hidden Treasure of Black ASL: Companion Video to the Book.” The original Black ASL Project research videos are also available.  Featured in the film Signing Black in America: The Story of Black ASL, produced by The Language and Life Project at North Carolina State University (Dr. Walt Wolfram, Executive Producer). Look for it on PBS.