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If you show excerpts and cited the book, it is obvious you are crediting the book, and it is not plagiarism. You are not claiming the passages from the book are your own writing, and it is "fair us...
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/47072 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/47072 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
If you show excerpts and cited the book, it is obvious you are crediting the book, and it is not plagiarism. You are not claiming the passages from the book are **your own writing** , and it is "fair use" (the legal term) to cite passages from a book verbatim in the course of critiquing the book. You don't have to worry about it. You can include segments of reasonable length (some paragraphs, usually, not _chapters_ or _whole scenes_) to illustrate the critiques you are making.