Mark Oshiro (born October 23, 1983) is an American author, editor, and activist based in Atlanta, Georgia. They write young adult and middle grade fiction books, often exploring themes of identity, belonging, and family.
Oshiro's science-fiction short story, "No Me Dejas," was published to Slate on April 30, 2018.[non-primary source needed]
On May 22, 2018, Oshiro published their debut young adult novel, Anger Is a Gift, through Tor Teen. It follows Moss Jeffries, a gay African-American student who suffers from panic attacks ever since his father was murdered by a police officer. The students organize a protest against police brutality and racist oppression. Moss also develops a romance with Javier, a Latino comic book artist.
On September 15, 2020, Oshiro published the fantasy novel Each of Us a Desert through Tor Teen. It takes place in a post-apocalyptic world, where the protagonist Xochitl resides in a village called Empalme. Xochitl is the village cuentista, who absorbs everyone's stories. Tired of her role, she ventures out on a journey of self-discovery. In October 2021, the book was included on Matt Krause's list of books to be banned from Texas schools; consequently, Oshiro experienced cancelled class visitations and loss of income.
Oshiro's first middle grade novel, The Insiders, was released on September 21, 2021. It follows Héctor Muñoz, a gay teenager, who finds a magic portal in his closet. Oshiro explained how they wrote it in their freshman or sophomore year of college, though it wasn't polished. Their intention was to "reclaim the closet": rather than being a coming out book, Oshiro asked, "What if you come out and have to go back in? How do you deal with this reality, which is that you have to come out for the rest of your life and figure out who you can talk to or not?"
On October 6, 2021, Oshiro was announced as the co-author of The Sun and the Star, alongside American author Rick Riordan. The novel was released May 1, 2023. Originally conceived as one book, Oshiro pitched the next idea of what would become the sequel. The sequel, The Court of the Dead, was released on September 23, 2025.
Oshiro's third YA novel, Into the Light, was released on March 28, 2023. It takes place in three different timelines through two characters and tackles conversion therapy. Colleen Mondor of Locus stated how the author "masterfully takes on an enormously important topic with his compelling, realistic, horrific novel ... powerful".
