"Apes and Angels (Star Quest Trilogy, 2)" by Ben Bova
https://www.amazon.com/Apes-Angels-Star-Quest-Trilogy/dp/0765379538/

Book number two of a three book science fiction series. I read the well printed and well bound MMPB that I bought new on Amazon that was
published by Tor in 2017. This series is also a rough continuance of
Bova's 20+ book Grand Tour of the Solar System series. I have purchased
a used copy of the third book in the series and am reading that now.

We humans on Earth were told about the deadly Gamma wave coming from the
center of the Milky Way Galaxy every 28,000 years by the Predecessors,
ancient intelligent machines that have seen many intelligent races
destroyed by the gamma wave. They have enlisted our help in erecting
force fields around the surrounding intelligent races around Sol to
prevent them from getting destroyed by the gamma wave that is coming in
2,000 years to the edge of the Milky Way.

The author has a website at:
http://benbova.com/

My rating: 4 out of 5 stars
Amazon rating: 4.4 out of 5 stars (161 reviews)

Lynn

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