About Pentominoes and About This Story p. xi
About the Artwork: A Challenge to the Reader p. xiii
Chapter 1 Three Deliveries p. 1
Chapter 2 The Letter is Dead p. 6
Chapter 3 Lost in the Art p. 18
Chapter 4 Picasso's Lie p. 35
Chapter 5 Worms, Snakes, and Periwinkles p. 43
Chapter 6 The Geographer's Box p. 50
Chapter 7 The Man on the Wall p. 61
Chapter 8 A Halloween Surprise p. 76
Chapter 9 The Blue Ones p. 81
Chapter 10 Inside the Puzzle p. 90
Chapter 11 Nightmare p. 99
Chapter 12 Tea at Four p. 112
Chapter 13 X the Experts p. 127
Chapter 14 Flashing Lights p. 134
Chapter 15 Murder and Hot Chocolate p. 144
Chapter 16 A Morning in the Dark p. 154
Chapter 17 What Happens Now? p. 167
Chapter 18 A Bad Fall p. 174
Chapter 19 The Shock on the Stairs p. 188
Chapter 20 A Maniac p. 198
Chapter 21 Looking and Seeing p. 205
Chapter 22 Twelves p. 214
Chapter 23 Help! p. 226
Chapter 24 The Pieces p. 236