Unit 1 Lesson 1 What Happened to Jimmy Hoffa? Lesson 2 The Truth About the Tasaday Lesson 3 Lost for 16 Years Lesson 4 The Weird World of Howard Hughes Lesson 5 The Mystery of the Mary Celeste Lesson 6 "I Buried Paul" Unit Summarizing 1 Unit 2 Lesson 7 The Lost Colony of Roanoke Lesson 8 The Strange Case of Mr. Wright Lesson 9 Ghost Ship in the Sky Lesson 10 Lost in the Arctic Lesson 11 The Curse of the Hope Diamond Unit Summarizing 2 Unit 3 Lesson 12 The Last Flight of the Star Tiger Lesson 13 The Tragic Donner Party Lesson 14 Courage in the Face of Evil Lesson 15 Death on Mount Everest Lesson 16 Did Anastasia Survive? Unit Summarizing 3 Appendix Answer Key