This Workman Classic Schoolbooks edition contains: 

• Background/Introduction 
• Biographies 
• Footnotes 
• Vocabulary and Comprehension/Extension questions for each story 
• Discussion Questions suitable for students or book clubs 
• Extension activities

Explore alternate worlds with these nine vintage science fiction selections. 
With everything from time-travel to extraterrestrial planets and robots, 
these stories will keep you on the edge of your seat...