Answer:
To write their letters home, soldiers purchased paper, envelopes, ink and pens from sutlers. Stationary makers printed many styles of patriotic stationary and envelopes with engravings of camp scenes or political humor and these were quite popular among soldiers.
We can actually deduce here that the book that the author use in the passage is: Sibling relationships.
<h3>Who is an author?</h3>
An author is actually known to be a person who writes, publishes and sells the published book. Authors share their knowledge, expertise and experience through writing.
We see in the attached image the passage that completes the question.
Thus, the actual book the author used in this passage is that of sibling relationship.
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Answer:
I dont think this is right but I think that people should studies