Answer:
Hello. You did not enter the answer options, but the term "previously perused paperbacks" is an euphemism for the term "softcover books" or "flimsy books".
Step-by-step explanation:
Euphemism is a figure of speech that is used to relieve a term, that is, euphemism allows the author to use a term that softens the sentence and has a milder and more pleasant meaning, to replace another term, which is more aggressive , can cause pelomic and discomfort to the reader.
In this case, we can say that the author uses the term "previously perused paperbacks" as an euphemism when referring to books with a soft, soft and rigid cover.