The Black Hole Experiments Trilogy

A trilogy with three high quality science fiction horror action-packed novelettes of explorers encountering mind-bending voyages beyond the boundaries of space and time!
In the first, Beyond the Universe, a newly invented voyager explores deep space, and leaves space and time, after something starts killing the crew, and in the depths of a minding-bending universe trace a new energy source, and encounter something of supernatural origins, hidden away there since the dawn of time.
In the second, The Black Hole Experiments, explorers stumble on a mysterious metallic sphere, with a pulsating vibration, on Mars.
At first they assume that it is the remains of a probe, but when they analyze its surface they find that it is far older than any of them thought possible.
They unlock it and it opens to reveal its forces, by the manipulation of gravitational forces, are suspending a black hole.
Scientists carry out experiments on the black hole, and at an exhibition an accident occurs and scientists enter it and travel out beyond the realms of space and time to another universe.
In the third, Beyond Space and Time, explorers are imprisoned aboard an ancient alien artifact voyager, archaeologists found after it crashed into the world.
It travels endlessly on to a gateway at the center of space, where it voyages beyond space and time to where it came from.
The voyager takes the explorers through new mind-bending universes, universe after universe, as it accelerates beyond anything experienced before.