Dan, you are right, and further research has confirmed that she is the sole author of the commentary section. (In fact, looking at the cover more closely now does, in fact, suggest just that.)
I just thought it interesting to have so many contributors at hand but just one commentary writer, especially since I don't recognize that name in the arena of commentary writings, and she is listed as a freelance writer. This certainly doesn't mean it's not well-written. Was just a bit curious to me. The publisher elaborates here.
It seems she is related (daughter) to Robert Gundry, interestingly enough.
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