He slept on the closet floor. The most powerful dreamer in Oz - the man whose sleeping mind rebuilt Emerald City in a single night - couldn't bring himself to use the bed they gave him. Oscar Diggs had been wanted for his power his entire life in Oz. Nobody had ever simply wanted him. Seventeen-year-old Glinda thought she was different. She wasn't. When jealousy drives her to reach into Oscar's sleeping mind and steal his secrets, she finds nightmares she was never meant to see - and unleashes a weapon that changes the strategic landscape of Oz forever. Oscar flees. Glinda chases, with armies and magic and the best intentions she knows how to have. A witch named Kally moves her own pieces across the board, using Oscar's dreams as a weapon neither woman fully understands. And somewhere in the wreckage of armies and automatons and nightmares made flesh, Glinda faces the one truth her power can't outrun. Loving someone the wrong way is its own kind of cruelty. Dark Dreams in Oz is the second book in the Hidden History of Oz - an epic fantasy series set decades before Dorothy, where the cost of power is always paid by someone who didn't choose the price.