Mark "Boo" Hewerdine (born 14 February 1961) is an English singer-songwriter and record producer. His work includes lead singer and creative force behind The Bible, formed in the 1980s, and reformed in 1994, as well as solo recordings and work for film. He has also produced records by several artists, including a long association with Eddi Reader. He has been described as "one of Britain's most consistently accomplished songwriters".