Cast of Shadows is a 2005 suspense novel by the American writer Kevin Guilfoile.

The book's plot is set in the near future at a time when cloning has been legalised in the U.S.

It is based around a Chicago-based cloning doctor, Davis Moore, whose daughter is brutally raped and killed.

The resulting clone is a boy called Justin Finn, whom Moore follows throughout his life, hoping the boy will offer a glimpse into the killer's psyche and perhaps enable Moore to find the identity of his daughter's murderer.

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