"The Radiant Dome (Perry Rhodan #2)" by K. H. Scheer and Walter
Ernsting, translated by Wendayne Ackerman
https://www.amazon.com/Radiant-Dome-Perry-Rhodan/dp/B0007ES920/

Book number two of a series of one hundred and twenty-six space opera
books in English. The original German books, actually pamphlets, number
in the thousands. The English books mostly have two translated German
stories per book. The German books were written from 1961 to present
time, having sold two billion copies and even recently been rebooted. I
read the well printed and well bound book published by Ace in 1969 that
I had to be very careful with due to age. I bought an almost complete
box of Perry Rhodans a decade or two ago on ebay that I am finally
getting to since I lost my original Perry Rhodans in The Great Flood of
1989.
https://en.wikipedia.org/wiki/Perry_Rhodan

In this alternate universe, USSF Major Perry Rhodan and his three fellow
astronauts blasted off in a three stage rocket to the Moon in 1971. The
first stage of the rocket was chemical, the second and third stages were
nuclear. After crashing on the Moon due to a strange radio
interference, they discover a massive crashed alien spaceship with an
aged male scientist (Khrest), a female commander (Thora), and a crew of 500.

Perry Rhodan, his crew, and Khrest have returned to Earth from the Moon.
But instead of landing in the USA, they landed in the Gobi desert.
And they erected a impenetrable force shield of several square miles
around the Stardust space ship. The entire world is perplexed and
angry. Reginald Bell goes to Australia to find a famous Leukemia doctor
to heal Khrest.

This book has the beginning of Perry Rhodan's Mutant Corps, two years
before the X-Men comic books were released. Neat !

Also, one has to remember that this book was written in German in 1961
and translated to English in 1969. Many items that came about in the
1970s and beyond such as cell phones are not reflected in the book.
However, commercial aircraft commonly traveling at Mach 3 are not
available to the public as talked about in the book. Niels Bohr's
saying "Prediction is very difficult, especially about the future" comes
to mind.

My rating: 4 out of 5 stars
Amazon rating: 4.1 out of 5 stars (5 reviews).

Lynn