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Laura Lam's adult sci-fi debut False Hearts: Two formerly conjoined sisters are ensnared in a murderous plot involving psychoactive drugs, shared dreaming, organized crime, and a sinister cult.

Raised in the closed cult of Mana's Hearth and denied access to modern technology, conjoined sisters Taema and Tila dream of a life beyond the walls of the compound. When the heart they share begins to fail, the twins escape to San Francisco, where they are surgically separated and given new artificial hearts. From then on they pursue lives beyond anything they could have previously imagined.

Ten years later, Tila returns one night to the twins' home in the city, terrified and covered in blood, just before the police arrive and arrest her for murder--the first homicide by a civilian in decades. Tila is suspected of involvement with the Ratel, a powerful crime syndicate that deals in the flow of Verve, a drug that allows violent minds to enact their darkest desires in a terrifying dreamscape. Taema is given a proposition: go undercover as her sister and perhaps save her twin's life. But during her investigation Taema discovers disturbing links between the twins' past and their present. Once unable to keep anything from each other, the sisters now discover the true cost of secrets.

Johnny Mnemonic meets a female Dexter in Laura Lam's new speculative thriller, set in the near-future SF world of False Hearts

Carina used to be one of the best biohackers in Pacifica. But when she worked for Sudice and saw what the company's experiments on brain recording were doing to their subjects, it disturbed her--especially because she found herself enjoying giving pain and contemplating murder. She quit and soon grew addicted to the drug Zeal, spending most of her waking moments in a horror-filled dream world where she could act out her depraved fantasies without actually hurting anyone.

One of her trips is interrupted by strange flashing images and the brutal murder of a young girl. Even in her drug-addicted state, Carina knows it isn't anything she created in the Zealscape. On her next trip, she discovers that an old coworker from Sudice, Max, sent her these images before he was killed by the company. Encrypted within the images are the clues to his murder, plus information strong enough to take down the international corporation.

Carina's next choice will transform herself, San Francisco, and possibly the world itself.