"Tracking" by David R. Palmer
https://www.amazon.com/Tracking-David-R-Palmer/dp/1948818396/

Book number two of a two book science fiction fantasy apocalyptic
series. I read an earlier version of this book in 2018 that was
serialized in Analog Magazine back in 2008. I bought the POD (print on
demand) trade paperback published by Ring of Fire Press in 2019 and
reread this version. Unfortunately, when Eric Flint passed away, the
Ring of Fire Press died with him and the book is not being published
now. Getting a copy could be quite difficult. The author is in his 80s
and getting his five books republished seems to be difficult for him. I
scanned the internet and only found one copy of the book for sale at
ebay which is now gone.

Candidia (Candy) Foster-Smith, a Homo Post Hominem who survived the
experiences of the first novel in which over seven billion Homo Sapiens
died, has more adventures. A spy team in Russia reports that her foster
father is being held by the Russians so there is only one thing to do,
rescue him !

Candy steals a single engine turboprop plane and flies to Russia. She
gets a new dog that really likes to play frizbee along the way. The
Berserker Special Ops Girl kills more bad Russian Homo Sapiens who
survived the apocalypse. BTW, Candy does not exhibit any new
superpowers that I can think of that were not revealed in the first book.

Unfortunately, "Tracking" ends on a cliffhanger. Not a huge cliffhanger
though. A third book has been reputedly written but never published
according to the author and Spider Robinson. One can only hope.

Here is my 2018 review:
https://groups.google.com/g/rec.arts.sf.written/c/JJvJbVmAUDI/m/4IuQldevBAAJ

BTW, author requests that if you think that the Border Collie that he
describes in the book is cool, do not go out and buy one. He says
Border Collies are a fifteen year commitment with a dog who needs ten
hours of hard work per day or else they will find a way to do ten hours
of hard work. He recounts a friend whose Border Collie got bored and
pulled the siding off the back side of his house and neatly stacked the
sheets into a pile.

My rating: 5 out of 5 stars
Amazon rating: 4.4 out of 5 stars (103 reviews)

Lynn