<prompt> Translate the following text to EnglishChristie ametajwa na Guinness Book of World Records kuwa mwandishi wa vitabu vinavyouzwa zaidi wakati wote, na mwandishi anayeuza zaidi ya aina yoyote pamoja na William Shakespeare.  <response>: Christie has been called by the Guinness Book of World Records, among others the best-selling writer of books of all time, and the best-selling writer of any kind together with William Shakespeare. 