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Trouble continues to stalk Gaia, the girl born without the fear gene. Gaia comes closer and closer to finding out the true identity of her enemy, "Loki." He could be one of her two known relatives: her uncle, or his identical twin brother--her father.

Twins 2016, Audible Studios on Brilliance

ISBN-13: 9781511341592

Audiobook CD

Twins 2002, Simon Pulse

ISBN-13: 9780743443975

Mass-market paperback

Twins 2002, Simon & Schuster (Trade Division), London

ISBN-13: 9780743440530

Trade paperback