Chapter 1 A letter from a pen-friend 1
Chapter 2 A day in the life of...whiz-kid Wendy 23
Chapter 3 Dealing with trouble 43
Chapter 4 Numbers:Everyone's language 62
Chapter 5 Look it up! 90
Chapter 6 Nobody wins(Part Ⅰ) 112
Chapter 7 Nobody wins(Part Ⅱ) 133
Keys 156