The head elected leader of the Terran Empire has been making erratic decisions, most recently invading a neutral planet to aid rebels trying to overthrow the democratically elected government. His son is convinced someone is manipulating his father and approaches an old family friend to help get proof.
Unfortunately, this story pretty much describes how things get done in any government. It ain't pretty, but it's efficient.
Cormac FitzGeoffrey is an Irish knight wandering the Near East after the Crusades. He arrives at a desert castle with a bad reputation as a thieves' stronghold, and meets a veritable United Nations of scoundrels.
Although evil monsters are hinted at, they never arrive, and the story is a gore-fest of ruthless characters all chasing a fabled ruby.
More "realistic" than Howard's Conan, King Kull, and Soloman Kane stories, because there is no magic involved.
A fearful interplanetary scout during an interstellar war with the Kradens is approached by a couple of slimy businessmen with a scheme to fake an enemy engagement and win him the Medal of Honor. He would then be above the law and able to accomplish certain projects that were not exactly legal.
The pilot and the slimeballs are all good characters, and the plot is quite believable.
A young inventor discovers how to move gravitons from place to place, and being able to make things heavier or lighter, goes into business hauling weightless cargo in a fuelless truck. But there are ramifications.
Good plot of an invention going wildly out of control. The characters were a little sketchy, but the ideas held the story together.