Amanda Eyre Ward 
How To Be Lost 

To their neighbours in suburban Holt, New York, the Winters family has it all: a grand home, a trio of radiant daughters and a sense of security in their affluent corner of America.But when five-year-old Ellie disappears, the fault lines within the Winters family are exposed.
Fifteen years later, Caroline, now a New Orleans cocktail waitress, sees a photograph of a woman in People Magazine. Convinced that it is Ellie all grown up, Caroline embarks on a search for her missing sister. As she travels through the New Mexico desert, the mountains of Colorado, and the smoky underworld of Montana, she devotes herself to salvaging her broken family.
How To Be Lost is a spellbinding novel about sisters, family secrets – and love.