Mary Higgins Clark is the world's best-loved thriller writer - she is published in 34 countries. * Each new novel sells 3.7 million copies across the world - outselling Martina Cole, Ian Rankin, Mark Billingham, Val McDermid and Jeffery Deaver. * All 42 of her books have been New York Times bestsellers * Over 3 million copies of Mary Higgins Clark titles sold in the UK alone * She is the 40th highest selling author in the UK * Will continue with our stunning new jacket treatment to recruit even more fans.