It's a problem when fursuiting is emphasised above everything else as it is not representative of the furry fandom as a whole but that does not mean that all use of a fursuit is bad. It doesn't sound like the book is misrepresenting furry as being only about fursuits and there is nothing wrong with its use of a fursuit. It might even work to the fandom's advantage to use a familiar symbol to attract attention if the book itself provides a balanced portrayal of what goes on.
"If all mankind minus one, were of one opinion, and only one person were of the contrary opinion, mankind would be no more justified in silencing that one person, than he, if he had the power, would be justified in silencing mankind."
~John Stuart Mill~
It's a problem when fursuiting is emphasised above everything else as it is not representative of the furry fandom as a whole but that does not mean that all use of a fursuit is bad. It doesn't sound like the book is misrepresenting furry as being only about fursuits and there is nothing wrong with its use of a fursuit. It might even work to the fandom's advantage to use a familiar symbol to attract attention if the book itself provides a balanced portrayal of what goes on.
"If all mankind minus one, were of one opinion, and only one person were of the contrary opinion, mankind would be no more justified in silencing that one person, than he, if he had the power, would be justified in silencing mankind."
~John Stuart Mill~