<prompt> Translate the following text to SwahiliChristie 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.  <response>: Christie 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. 