The situation arises from a public LiveJournal comment. The author of said public post now says I am in violation of her copyright and therefore open to litigation and/or removal from the site where the quote is made unless I remove the quote.
The review in question is my own and thus not a problem with copyright infringement since I own the rights and may publish it in any way I choose without or without citation, although I chose to cite the review and provide a link. The copyright infringement allegations come from the author who mentioned my review in a public LiveJournal post that I quoted in its entirety without comment or editorializing in any way. I wanted people to read the review and her response and judge the merits of each.
I originally had a link to the public post but she made the post friends only. I had copied the public post in its entirety because I had a suspicion that she would lock the post and keep those who aren’t friends from making an informed judgment. The post mentions the review but then descends wholeheartedly into attacking me personally without answering my judgment of the book, except to say that I “trashed” the book and her personally out of professional and personal malice.