Magic squares of numbers are square arrays of numbers such that each column and each row add to the same number. An example of a 3 by 3 magic square is the well known array 8 1 6 3 5 7 4 9 2 which has each row and column add to 15. In this puzzle book there are 90 five by five magic squares, each with either 9 or 10 numbers removed. Your task, should you wish to undertake it, is to figure out those missing numbers so as to restore the magic square.