MAGIC SQUARES

A divertissement for lovers of that odd new recreation, the computer-programming brain-twister. Calter, author of Problem Solving with Computers, assembles a blithe sequence of puzzles (""Find the largest number that can be obtained using three digits""; ""Try to write a calendar program""). In between programs there's a cartoonish little story about oafish detective Matrix Inverse foiling Sebastian Sinusoid's scheme to destroy all the world's computers at one swell loop. Your favorite Fortran-speaker may find it cute.