The Stargate Black Hole X3

A classic SF masterpiece with two SF action thrillers! A secret agent probes scientists creating a stargate after time warps and black holes are made in particle accelerators in space, and enters it and hurtles through a gateway, and a starship crew is attacked by a devil-like presence in deep space and leave space and time, and in a minding-bending universe meet one of the most deadliest menaces!
In the first story, Particle Accelerator X3, an intelligence agent is sent on an ultimate mission! Scientists create a stargate on the moon after time warps and new forms of black holes are created in particle accelerators in space! Reports claim there is an ultimate weapon capable of destroying entire worlds! Scientists carry out experiments on the colossal stargate, gateway to the stars, and at an exhibition of it an accident occurs and the intelligence agent enters it and travels out beyond the realms of the universe, and hurtles through a mind-bending gateway through galaxies!
In the second, Beyond the Universe, a newly invented voyager explores the deepest depths of the universe and leaves space and time when it encounters a devil-like presence floating in deep space, hidden away in a colossal void since the dawn of time, and on a world in the depths of a new minding-bending universe the crew encounter one of the deadliest menaces in existence of supernatural origins!