[3] Born in New York, she grew up in Pennsylvania; before moving to Spain in 1990, where she began writing about British and American literature in La Vanguardia newspaper in 1994.

Since then, Miles has published articles, interviews and reviews, also on Spanish language literature for ABC, La Nación, Reforma and El País.

In May 2001 she became publishing director at Emecé Editores (Planeta),[4] where she published or promoted translations to Spanish of writers like John Cheever, Richard Yates, Yasunari Kawabata, Silvina Ocampo, Edgardo Cozarinsky, Lydia Davis, Monica Ali and Eliot Weinberger, among others.

On 2006 she moved to Alfaguara,[5] where she published John Banville, Joyce Carol Oates, Ngũgĩ wa Thiong'o, James Lasdun and Gary Shteyngart.

Between 2008 and 2012, she was named publishing director of Duomo Ediciones, an imprint of the Italian group Mauri Spagnol, where she published both the work of young Spanish-language authors such as Carlos Yushimito, Sebastià Jovani and Rodrigo Hasbún and the work of English-language writers in Spain and Latin America, such as David Mitchell, Azar Nafisi, Nicholson Baker, Aleksandar Hemon, Jayne Anne Phillips, John Gray and William Boyd.