ZAHN, TIMOTHY
Blackcollar
1 1983 The Blackcollar
2 1986 The Backlash mission
2006 Blackcollar (om)
Cobra
1 1985 Cobra
2 1986 Cobra strike
3 1988 Cobra bargain
Conqueror
1 1994 Conqueror's pride
2 1995 Conqueror's heritage
3 1996 Congueror's Legacy
Dragonback
1 2002 Dragon and Thief
2 2004 Dragon and Soldier
3 2005 Dragon and Slave
4 2006 Dragon and Herdsman
5 2007 Dragon and Judge
Star Wars Cycle 
1 1991 Heir to the empire
2 1992 Dark force rising
3 1993 The Last command
Star Wars: The Hand of Thrawn
1 1997 Specter of the Past
2 1998 Vision of the Future
Venture
11 1983 Blackcollar
15 1985 Cobra
17 1986 Cobra strike
19 1986 Backlash mission
23 1988 Cobra Bargain

ZAKOUR, JOHN & LAWRENCE GANEM
Zachery "Zach" Nixon Johnson, last free-lance private investigator on Earth
1 2001 The Plutonium Blonde
2 2004 The Doomsday Brunette
3 2005 The Radioactive Redhead

ZAMACONA, JORGE
Millennium
4 1998 The Wild and the Innocent

ZEBROWSKI, GEORGE (ED)
Nebula Awards
20 1985 Nebula award stories 20
21 1986 Nebula award stories 21
22 1988 Nebula award stories 22

ZEDDIES, ANN TONSOR
[ also writes as Toni Anzetti ]
Singer
1 1992 Deathgift
2 1993 Sky road

ZELAZNY, ROGER
Amber
[ see also the prequel series written by John Gregory Betancourt ]
1 1970 Nine princes in Amber
2 1972 The Guns of Avalon
3 1975 Sign of the Unicorn
4 1976 The Hand of Oberon
5 1978 The Courts of Chaos
2000 The Chronicles of Amber (om 1-5)
Amber 2
1 1986 Trumps of doom
2 1986 Blood of Amber
3 1987 Sign of chaos
4 1989 Knight of shadows
5 1991 Prince of chaos
1999 The Great Book of Amber (om of all books in both series)
Azzie Elbub (with Robert Sheckley)
1 1994 Bring me the Head of Prince Charming
2 1995 A Farce to be Reckoned With
Changeling
1 1980 Changeling
2 1981 Madwand
1989 Wizard World (om 1-2)
Cthulhu Mythos
1993 A Night in the Lonesome October
Dilvish
1981 The Changing land
1982 Dilvish the Damned

ZELAZNY, ROGER (ED)
Nebula awards
3 1968 Nebula award stories 3

ZETFORD, TULLY
pseudonym of Kenneth Bulmer
Hook
1 1974 Whirlpool of stars
2 1974 The Boosted man
3 1974 Star city
4 1975 The Virility gene

ZETTEL, SARAH
Camelot
[ based on the poem Sir Gawain and the Green Knight ]
1 2004 Camelot's Shadow (US: In Camelot's Shadow)
2 2005 Camelot's Honour (US: For Camelot's Honor)
3 2006 Camelot's Sword (US: Under Camelot's Banner)
Isavalta Trilogy
1 2002 A Sorcerer's Treason
2 2002 The Usurper's Crown
3 2004 Firebird's Vengeance

ZICREE, MARC SCOTT
Magic Time
1 2001 Magic Time (with Barbara Hambly)
2 2002 Angel Fire (with Maya Kaathryn Bohnhoff)

ZIMMER, PAUL EDWIN
see also joint author Marion Zimmer Bradley
Dark Border
1 1982 Lost prince
2 1982 King Chondo's ride
3 1987 A Gathering of heroes

ZINDELL, DAVID
Ea Cycle
1 2001 The Lightstone (in 2002 split into two volumes: Part 1: The Ninth Kingdom; Part 2: The Silver sword)
2 2002 The Lord of Lies
3 2005 Black Jade
4 2007 The Diamond Warriors
Neverness
1988 Neverness
Neverness: a Requiem for Homo-Sapiens
1 1993 The Broken god
2 1996 The Wild
3 1998 War in Heaven

ZOLAR
Dennis Wheatley Library of the Occult
18 1974 Interpretation of dreams (non-fiction)