One day many years ago a student came up to me and said, `I bet you do not know what "8 S on an SS" stands for?' I didn't, and it took me several days to work it out. But I did, on my own, and experienced the thrill every puzzle solver feels when the moment of revelation occurs. Immediately, I began to collect and manufacture them myself. This book contains the biggest assembly of these puzzles ever published, graded from very easy to the fiendishly difficult, with one word clues to encourage people who need a little help. The other type of puzzles in this book are of the "What Comes Next?" variety --- you are given a sequence of usually six letters or numbers and asked what you think the next term should be. These puzzles are immensely popular with all ages, genders, occupations, and nationalities. They can help to develop intelligence, general knowledge, concentration, and lateral thinking, and can be used in family, classroom, and community games and activities.