Atthehighestlevelofdescription,thisbookisaboutdatamining.However,itfocusesondataminingofverylargeamountsofdata,thatis,datasolargeitdoesnotfitinmainmemory.Becauseoftheemphasisonsize,manyofourexamplesareabouttheWebordataderivedfromtheWeb.Further,thebooktakesanalgorithmicpoi