How does an author create the unsettling atmosphere of psychological suspense?

There are many ways in which an author can create an atmosphere of psychological suspense. For example, the author can do so by using words that have scary denotations and connotations. The author can also increase the suspense of the story by using a slow pace. Finally, the author can increase the psychological suspense of the story through the characters, settings and events he presents.

the dictionary definition of ubiquitous is "present, appearing, or found everywhere".

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.