"Home: Book Three, the Darwin's World Series" by Jack L Knapp

"Home: Book Three, the Darwin's World Series" by Jack L Knapp
    https://www.amazon.com/Home-Book-Three-Darwins-World/dp/1719885370/
Book number three of a five book science fiction series.  I read the well printed and well bound POD (print on demand) trade paperback published in 2018 by the author that I bought new on Amazon.  I have bought book four in the series for reading soon.
In the 25th century, humanity has solved all problems and even created machines for time travel and parallel universe travel.  But, they caused a new problem, humanity is dying out as people have lost the will to live.
So the future scientists are bringing forward dying people from the 20th century, restoring their bodies to their 20 year old age, and transferring them to Earth 4428, a human less parallel world going through the end of the Pleistocene ice age.  With nothing but a few tools and the clothes on their backs.  Survive or die in the primitive conditions of what will be the southern USA but there are lions, big cats, mammoths, bison, dire wolves, deer, elk, short face bears, grizzlies, etc.  And chest deep snow in the winters.
Matt and several others were deposited by the futurists into what will be the eastern portion of Texas.  They moved to the western side of Texas and closer to the Gulf of Mexico to reduce the number of slaver attackers and the terrible winters.  They settled in what is the Rio Grande area, close to the Gulf of Mexico.  But, there is a huge slaver community just south of them.
My rating:  5 out of 5 stars
Amazon rating:  4.3 out of 5 stars (250 reviews)
Lynn