Meanwhile, Vernor Vinge's massive space opera A Deepness in the Sky comes out in paperback and military SF writer David Weber has fun with UFOs, time travel and one extremely ticked-off invading alien.

Manifold: Time, by Stephen Baxter

Reid Malenfant has just washed out of the space program, but he's determined to get into space anyway. How far will he go, and what will he do when he realizes that not just his future -- or even the future of humanity -- depends on his success?

Learning Fear, by B. A. Chepaitis

Jaguar Adams is an "empathic psychologist," using her abilities to help criminals face the fears that have driven them to their most desperate acts. But somebody is telepathically invading her mind, and now Dr. Adams must face her own worst fears.

(Ace Books, $6.50 paperback)

The Faded Sun Trilogy, by C. J. Cherryh

When a race of golden-skinned creatures is nearly annihilated in a war with "human" enemies, it's up to three individuals to save their race from extinction by retracing its historic migration across the galaxy. An omnibus reprint of three early Cherryh novels.

(Daw Books, $7.99 paperback)

The Light of Other Days, by Arthur C. Clarke and Stephen Baxter

A brilliant industrialist harnesses the cutting edge of quantum physics to enable people to see anyone anywhere and even look backward in time. Can human society survive the sudden annihilation of the right to privacy?

(Tor Books, $24.95 hardcover)

The Stone Canal, by Ken MacLeod

Life on New Mars is tough but orderly until a clone who remembers life as a nuclear-armed anarchist arrives on the planet. The first U.S. publication of MacLeod's award-winning second novel.

(Tor Books, 24.95 hardcover)

Nimisha's Ship, by Anne McCaffrey

Lady Nimisha Boynton-Rondymense is a gifted starship designer following in her father's footsteps at the family shipyards -- but when rival family members make a play to control the yards for themselves, Lady Nimisha finds herself marooned aboard an experimental starship. Can she find her way home and reclaim her inheritance?

(Del Rey Books, $6.99 paperback)

The Price of Peace, by Mike Moscoe

In the wake of a war between the Society of Humanity and the Unity Party, starship captain Inez Umboto must defend a no-man's-land of space from the pirates now roaming freely within it.

(Ace Books, $5.99 paperback)

Star Trek: Strange New Worlds 1 and 2, edited by Dean Wesley Smith

Two anthologies of winning entries in Pocket's Star Trek fan fiction contests.

(Pocket Books, $6.50 paperbacks)

Stardoc, by S. L. Viehl

A doctor leaves Earth and accepts a position tending members of nearly 200 sentient species inhabiting the frontier world Kevarzanga-2. But if anyone ever discovers the truth behind her medical expertise, it could destroy humanity's relationship with the many alien races on the planet .

(Roc Books, $6.99 paperback)

A Deepness in the Sky, by Vernor Vinge

The free-trading Qeng Ho and the viciously focused Emergents have each sent trading missions to a spider-like alien race just awakened from 200 years of hibernation. But will their battles with each other destroy their chance to make contact? A prequel to Vinge's 1992 novel, A Fire Upon the Deep.

(Tor Books, $6.99 paperback)

The Apocalypse Troll, by David Weber

Richard Ashton is a vacationing Navy captain on the edge of retirement, minding his business and sailing solo across the Atlantic. Then he witnesses a battle between UFOs and the U.S. Navy, rescues a beautiful time-travelling space pilot and learns that a sinister alien with enough weapons to destroy the Earth is loose....

(Baen Books, $7.99 paperback)

Eagle Against the Stars, by Steve White

When the Lokaron discovered Earth, they picked America to use as their puppet in dominating the planet. They're backing up their trade terms with irresistible weapons, but worms turn, and like the Europeans of a century ago, the Lokaron are going to learn a hard lesson from their victims.

(Baen Books, $6.99 paperback)

The Day of the Triffids, by John Wyndham

Giant intelligent plants invade Britain in this reissue of Wyndham's classic alien invasion novel.