From looking at the title, which one of the following books is most likely to be nonfiction?
a. the spy who came in from the cold
b. excercise for all scans
c. the stranger within
d. a summer in venice

From looking at the titles provided above, the one which is most likely to be nonfiction is:

D. a summer in Venice

The title of the book in this depicts real experiences of real people because it is more realistic and does not includes fictional words.