Ruby Red (The Ruby Red Trilogy, 1)

Gwyneth Shepherd's sophisticated, beautiful cousin Charlotte has been prepared her entire life for traveling through time. But unexpectedly, it is Gwyneth who in the middle of class takes a sudden spin to a different era! Gwyneth must now unearth the mystery of why her mother would lie about her birth date to ward off suspicion about her ability, brush up on her history, and work with Gideon―the time traveler from a similarly gifted family that passes the gene through its male line, and whose presence becomes, in time, less insufferable and more essential. Together, Gwyneth and Gideon journey through time to discover who, in the 18th century and in contemporary London, they can trust. Kerstin Gier's Ruby Red is young adult novel full of fantasy and romance.

Gwyneth Shepherd's sophisticated, beautiful cousin Charlotte has been prepared her entire life for traveling through time. But unexpectedly, it is Gwyneth who in the middle of class takes a sudden spin to a different era!
Gwyneth must now unearth the mystery of why her mother would lie about her birth date to ward off suspicion about her ability, brush up on her history, and work with Gideon—the time traveler from a similarly gifted family that passes the gene through its male line, and whose presence becomes, in time, less insufferable and more essential. Together, Gwyneth and Gideon journey through time to discover who, in the 18th century and in contemporary London, they can trust.
Kerstin Gier's Ruby Red is young adult novel full of fantasy and romance.

Gwen lives with her extended-- and eccentric-- family in an exclusive London neighborhood. The time-traveling gene that runs like a secret thread through the female half of the family is supposed to have skipped over Gwen, so she hasn't been introduced to "the mysteries," and can spend her time hanging out with her best friend, Lesley. It comes as an unwelcome surprise when she starts taking sudden, uncontrolled leaps into the past. She is unprepared for time travel, not to mention all that comes with it: fancy clothes, archaic manners, a mysterious secret society, and Gideon, her time-traveling counterpart. He's obnoxious, a know-it-all... and possibly the best-looking guy she's seen in any century. -- adapted from back cover

gwyneth Shepherd's Sophisticated, Beautiful Cousin Charlotte Has Been Prepared Her Entire Life For Traveling Through Time. But Unexpectedly, It Is Gwyneth, Who In The Middle Of Class Takes A Sudden Spin To A Different Era!

gwyneth Must Now Unearth The Mystery Of Why Her Mother Would Lie About Her Birth Date To Ward Off Suspicion About Her Ability, Brush Up On Her History, And Work With Gideon—the Time Traveler From A Similarly Gifted Family That Passes The Gene Through Its Male Line, And Whose Presence Becomes, In Time, Less Insufferable And More Essential. Together, Gwyneth And Gideon Journey Through Time To Discover Who, In The 18th Century And In Contemporary London, They Can Trust.

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