Ruby red - Gier, Kerstin 1966- (Henry Holt, 2011)
Forts. bildet: Gier, Kerstin: Sapphire blue. - "Originally published in 2009 by Arena Verlag GmbH under the title Rubinrot: Liebe geht durch alle Zeiten"--Copyright p. -- Sequel: Sapphire blue. -- Sixteen-year-old Gwyneth discovers that she, rather than her well-prepared cousin, carries a time-travel gene, and soon she is journeying with Gideon, who shares the gift, through historical London trying to discover whom they can trust.