As an exhibition dedicated to his career closes at the Brooklyn Public Library, Jay Z’s entertainment company Roc Nation is partnering with Christie’s to auction off 13 one-of-kind metal library cards depicting artwork from his solo studio albums in support of the institution.

The signed leather case holds 14 limited-edition library cards. Courtesy Christie’s

The single-lot auction opened for online bidding on Nov. 29 and will close tomorrow (Dec. 5). Featuring cover art ranging from Jay Z’s 1996 debut album, Reasonable Doubt, to 2017’s 4:44, the cards will be delivered to the winner nestled in a signed black leather briefcase and accompanied by a metal bookmark plus an additional library card commemorating “The Book of HOV” exhibition at the Brooklyn Public Library’s central branch. The top bid as of publication was $30,000.

All proceeds from the sale will benefit the Brooklyn Public Library, supporting operations and programming including its justice initiatives, youth programs and efforts to combat censorship. “The public’s response to “The Book of HOV” exhibition has been truly overwhelming,” said Desiree Perez, CEO of Roc Nation, in a statement. “Collaborating with Christie’s for this auction is an honor and I hope that the spirit of “The Book of HOV” serves as an inspiration for others to consistently support vital community institutions.”