Martian Concerns and Other Tales

¿ Earth scientists rocket to Mars, bearing a secret plan for future Martians. But the Martians have plans of their own.
¿ A devious AI runs amok. Mars's entire security apparatus can't pin it down.
¿ Through startling revelations, a lovelorn man uncovers the root of his wife's troubles.
¿ An old smartaleck Deadhead from Princeton University's maintenance garage harbours a top-secret story.
¿ A struggling artist finds unusual allies: bums and a witch.
¿ After 219 years, a warlock stumbles into his first love.