by David Ward (1994)
When Ryan Graham goes to New Denver to interview an arrogant scientist who plans a daring experiment in time travel, the Graham family and others are drawn into a race to keep the universe from being destroyed.
David Teague
"Henry Cicada just wants to be plain, but extraordinary things keep happening to him. When he's accidentally transported to a different dimension, he realizes a little wackiness is the key to adventure"--
Andre Norton
When Earthmen got into space, they found advanced races who deemed Earth far too barbaric to join them. They were assigned the only task deemed suitable, mercenaries on other backwards planets. Kana Karr, Arch Swordsman, Third Class, has his first assignment on Fronn. However, there they find weapons that belong only to the Galactics, and mechanized Terrans, all illegal. They must fight the entire planet to find a way to return and warn Central Command.
Julia Riding
Eking out a desperate existence as a renegade with the other Portkids who hide in the old tunnels under a spaceport on Mars, the teenager known as Streak stumbles on clues to the sabotage plaguing the entire solar system.
Mark Shulman
Fillmore the boy and Geary the robot, who live on Planet Zada, take their robotic dog Sbot to other planets so that he can learn to act like a real dog.