" " booxworm.lk . "The Dip: A Little Book That Teachs You When Quit ( )" . " " ? " " . "" - - . , . , . "Dip" " . ." (): " . ." (): " . ." " ." : : ( ) : ISBN : 9781591841661 : : 2007 : 80 : booxworm.lk "The Dip" . , : , 3 288/A, ,