Ironside: A Modern Faerie Tale is a young adult urban fantasy novel by Holly Black.

It is considered to complete a trilogy called [A] Modern Tale of Faerie, literally the subtitle of the intervening second book Valiant.

Miserable and convinced she belongs nowhere, Kaye decides to tell her mother the truth that she is a changeling, long ago left in place of a human daughter.

Her mother's shock and horror sends Kaye to the Seelie Court to find her human counterpart and bring her back to Ironside.

Kaye returns to her grandmother's house in order to retrieve her things where she finds her replacement, Kate, in her bedroom.

At this, Roiben reveals that he has gathered an army from the exiled fae, which surround the Seelie Court, but Silarial then threatens Kaye's life.

Kaye strikes a deal with Kate to teach her about being a human in return for being taught about being a faerie, in an attempt to help the girl adjust.

Preisendorfer for School Library Journal called it "magical", a "dark beauty", and "enchanting", and said the "narration is spot-on for every character.

"[6] Rutan for Booklist said that "characters struggle to shape their identities, quintessential coming-of-age" and called Ironsides a novel about "betrayal, loyalty, and love.