The Lost Continent by Edgar Rice Burroughs was originally published under the title Beyond Thirty - https://www.gutenberg.org/cache/epub/149/pg149-images.html

 Since earliest childhood I have been strangely fascinated by the mystery surrounding the history of the last days of twentieth century Europe. 

Then came the fruition of that historic propaganda which is best described by its own slogan: “The East for the East—the West for the West,” and all further intercourse was stopped by statute.

I was born in Arizona, in the United States of North America, in the year of our Lord 2116. Therefore, I am twenty-one years old.

TOMORROW THE WORLD! By Geoff St. Reynard - https://www.gutenberg.org/cache/epub/65902/pg65902-images.html

 

TOO MANY EGGS BY KRIS MELVILLE - https://www.gutenberg.org/cache/epub/61278/pg61278-images.html

 

THE SKY IS FALLING By LESTER DEL REY - https://www.gutenberg.org/cache/epub/18768/pg18768-images.html

 Whatever

[Pg 13] was going on, he was in no shape to interrupt anything. But he knew that this was no delirium. He didn't have that kind of imagination.

"Ignorance was bad enough," Ser Perth interrupted in amazement. He stared at Dave, shaking his head in disgust. "You obviously come from a culture of even more superstition than ignorance. Dave Hanson, the sky is no such thing. Put aside the myths you heard as a child. The sky is a solid sphere that surrounds Earth. The stars are no more like the sun than the glow of my cigarette is like a forest fire. They are lights on the inside of the sphere, moving in patterns of the Star Art, nearer to us than the hot lands to the south."

"None remembers truly. He has always been the Sather Karf—at least ten thousand years or more. To attain the art of a Sather is the work of a score of centuries, usually."

ALCATRAZ OF THE STARWAYS By ALBERT dePINA and HENRY HASSE - https://www.gutenberg.org/cache/epub/62377/pg62377-images.html

 

CULTURAL EXCHANGE BY KEITH LAUMER - https://www.gutenberg.org/cache/epub/61263/pg61263-images.html

 

HUNT the HUNTER BY KRIS NEVILLE - https://www.gutenberg.org/cache/epub/51433/pg51433-images.html

 Of course using live bait is the best

way to lure dangerous alien animals ...
unless it turns out that you are the bait!