Sam Loyd (1841-1911) was America's greatest originator of puzzles. For more than 50 years, his ingenious posers, appearing in innumerable newspaper and magazine articles, stumped and delighted an American public running into the millions. (Four or five of his mechanical puzzles became national crazes.) After Loyd's death, his son issued a vast collection of these problems in a book entitled "Cyclopedia of Puzzles" -- probably the most famous and exciting...