''Original Sin''by Michael Jan Friedman.Centuries after the death of the original Ellen Ripley, her clone has joined the fight against the Alien threat. With the help of an android named Call, a brutal hired gun named Johner, and a paraplegic mechanic named Vriess, she will battle an Alien horror, and discover the answer to a question that pierces the Alien mystery to its seething acid-chamber of a heart. ''DNA War''by Diane Carey.In a bleak galaxy, the hospitable planet Rosamond 6 is a rare find. But while it may look like an oasis among the stars, it harbors a fatal secret: it is infested with Aliens. Eager to prove her theory that the Aliens can be reasoned with, anthropologist Jocasta Ma