this is the book of ahmad ibn-fadlan , ibnal-abbas , ibn-rasid , ibn-hammad , a client of muhammad ibn-sulayman , the ambassador from al-muqtadir to the king of the saqaliba , in which he recounts what he saw in the land of the turks , the hazars , the saqaliba , the baskirs , the rus , and the northmen , of the histories of their kings and the way they act in many affairs of their life .