Giles Tremlett is an author, journalist and broadcaster. He is the Madrid Correspondent for the Economist. Until 2013 he was the Madrid Correspondent for the Guardian newspaper for which he is now a Contributing Editor, specializing in long form reportage.  He has also been a regular current affairs commentator for various Spanish broadcasters, including Spain's state-owned TVE television and for the country's biggest radio station, Cadena SER. He graduated in Human Sciences (Anthropology) at the University of Oxford in 1984. He has also studied at the Universities of Barcelona and Lisbon.
He moved around the world from an early age, following his father Colonel Edward Tremlett to postings in South Africa, Tanzania, Kenya, Turkey and Germany. He had his first taste of Spanish life when he lived in Barcelona for two years in the mid eighties. After a period in Lisbon and then in London, he returned to live in Spain at the beginning of the 1992 Olympics. He currently lives in Madrid with his wife Katharine Blanca Scott and their two children Lucas and Samuel.
His book Ghosts of Spain: Travels through a country’s hidden past (2007) was translated into five languages and sold over 100,000 copies worldwide.
In 2010 he published a biography of Catherine of Aragon, the Spanish infanta who was Henry VIII's first wife, with Faber and Faber in London and Walker in New York. Catherine of Aragon was BBC Radio 4's "Book of the Week" in November 2010, and sold some 50,000 copies worldwide. Translation into Spanish was published in 2012 and translations into Russian and Polish were due to be published by the end of 2013.
He is currently working on a biography of Isabella of Castile.
- Ghosts of Spain Faber and Faber. ISBN 978-0-571-22169-1
- Catherine of Aragon Walker & Company. ISBN 978-0-8027-7916-8