Complex sentence: The book was translated into English in 2004 by Lucia Graves and sold over a million copies in the UK after already achieving success on mainland Europe, topping the Spanish bestseller lists for weeks.
Split into simpler sentences: The book was translated into English in 2004 by Lucia Graves and has sold over a million copies in the UK alone. Prior to that it had already achieved huge success on mainland Europe, topping the Spanish bestseller lists for weeks.