<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.hadi alipofikisha umri wa miaka 75 alikuwa ameshachapisha vitabu 75 kikiwemo kinachojulikana sana cha living long, living good ambacho kimeuza zaidi ya nakala milioni 1.2.  <response>: he has published around 15 books since his 75th birthday, including living long, living good, which sold more than 1.2 million copies. 