The Time Trader Books in Series Order:

1. The Time Traders (1958)
2. Galactic Derelict (1959)
3. The Defiant Agents (1962)
4. Key Out of Time (1963)
5. Firehand (1994) (with Pauline M Griffin)
6. Echoes in Time (1999) (with Sherwood Smith)
7. Atlantis Endgame (2002) (with Sherwood Smith)

Series Updated/Continued

Atlantis Endgame: A New Time Traders Adventure
Echoes in Time (Time Traders) 1999
The Time Traders(The Time Traders/Galactic Derelict) 2006
The Time Traders II(Defiant Agents/Key out of Time) 2002
Firehand 1995

The Witch World Saga

Witch World : Estcarp Cycle

1. Witch World (1963)
2. Web of the Witch World (1964)
3. Three Against the Witch World (1965)
4. Warlock of the Witch World (1967)
5. Sorceress of the Witch World (1968)
6. Trey of Swords (1977)
7. Ware Hawk (1983)
8. The Gate of the Cat (1987)
9. Ciara's Song (1998)
10. The Duke's Ballad (2005) (with Lyn McConchie)

Witch World : High Halleck Cycle

1. Year of the Unicorn (1965)
2. The Crystal Gryphon (1972)
3. Spell of the Witch World (1972)
4. The Jargoon Pard (1974)
5. Zarsthor's Bane (1978)
6. Gryphon in Glory (1981)
7. Horn Crown (1981)
8. Gryphon's Eyrie (1984) (with A C Crispin)
9. Were-Wrath (1989)
10. Songsmith (1992) (with A C Crispin)
11. Silver May Tarnish (2005) (with Lyn McConchie)

Witch World : The Turning

1. Storms of Victory (1991) (with Pauline M Griffin)
2. Flight of Vengeance (1992) (with Pauline M Griffin and Mary H Schaub)
3. On Wings of Magic (1994) (with Patricia Matthews, Sasha Miller)
4. The Key of the Keplian (1995) (with Lyn McConchie)
5. The Magestone (1996) (with Mary H Schaub)
6. The Warding of Witch World (1996)

Other Series:

Solar Queen Series

1. Sargasso of Space (1955)
2. Plague Ship (1956)
3. Voodoo Planet (1959)
4. Postmarked the Stars (1969)
5. Redline the Stars (1993)
6. Derelict for Trade (1997)
7. A Mind for Trade (1997)
The Solar Queen (Paperback) (omnibus)

Hosteen Storm (Beast Master Series)

1. The Beast Master (1959)
2. Lord of Thunder (1962)
3. Beast Master's Ark (2002) (with Lyn McConchie)
4. Beast Master's Circus (2004) (with Lyn McConchie)
5. Beast Master's Quest

(2006) (with Lyn McConchie)

Forerunner Series:

1. Storm over Warlock (1960)
2. Ordeal in Otherwhere (1964)
3. Forerunner (1971)
4. Forerunner Foray (1973)
5. The Second Venture (1985)

Game of Stars and Comets

1. The X Factor (1965)
2. The Sioux Spaceman (1960)
3. Eye of the Monster (1962)
4. Voorloper (1980)

After the Apocalypse

1. Daybreak 2250 AD (1952) aka Star Man's Son
2. No Night Without Stars (1975)

Central Control

1. Star Rangers (1953) aka The Last Planet
2. Star Guard (1955)

Pax / Astra

1. The Stars Are Ours (1954)
2. Star Born (1957)

Crosstime

1. The Crossroads of Time (1956)
2. Quest Crosstime (1965) aka Crosstime Agent

Rebel

1. Ride Proud, Rebel! (1961)
2. Rebel Spurs (1962)

Dipple

1. Catseye (1961)
2. Night of Masks (1964)

Janus

1. Judgment on Janus (1963)
2. Victory On Janus (1966)

Dark Companion

1. Dark Piper (1968)
2. Dread Companion (1970)

Murdoc Jern

1. The Zero Stone (1968)
2. Uncharted Stars (1969)

Gods and Androids

1. Android at Arms (1971)
2. Wraiths of Time (1976)

Magic Books

1. Steel Magic (1965)
2. Octagon Magic (1967)
3. Dragon Magic (1967)
4. Fur Magic (1968)
5. Lavender-Green Magic (1974)
6. Red Hart Magic (1976)

Moonsinger

1. Moon of Three Rings (1966)
2. Exiles of the Stars (1971)
3. Flight in Yiktor (1986)
4. Dare to Go A-hunting (1989)
5. Brother to Shadows (1993)

Swords

The Sword is Drawn (1944)
Sword in Sheath (1949)[Island of the Lost (1953)]
At Swords' Point (1954)

Quag Keep

Quag Keep (1978)
Return to Quag Keep (2006)

Halfblood Chronicles (with Mercedes Lackey)

1. Elvenbane (1991)
2. Elvenblood (1995)
3. Elvenborn (2002)

Star Ka'at with Dorothy Madlee

1. Star Ka'at (1976)
2. Star Ka'at World (1978)
3. Star Ka'ats and the Plant People (1979)
4. Star Ka'ats and the Winged Warriors (1981)

Five Senses

1. Wind in the Stone (Hearing) (1999)
2. Mirror of Destiny (Sight) (1995)
3. The Scent of Magic (Smell) (1998)
4. A Taste of Magic (Taste) (2006) with Jean Rabe
5. The Hands of Lyr (Touch) (1994)

Cycle of Oak, Yew, Ash, and Rowan (with Sasha Miller)

1. To the King a Daughter (2000)
2. Knight or Knave (2001)
3. A Crown Disowned (2002)
4. Dragon Blade (2005)
5. The Knight of the Red Beard (2008)

The Prince Commands (1934)
Ralestone Luck (1938)
Follow the Drum (1942)
Rogue Reynard (1947)
Scarface (1948)
Huon of the Horn (1951)
Yankee Privateer (1955)
Sea Siege (1957)
Star Gate (1958)
Secret of the Lost Race (1959)
Shadow Hawk (1960)
Eye of the Monster (1962)
Operation Time Search (1967)
Dark Piper (1968)
Stand to Horse (1968)
Dread Companion (1970)
Ice Crown (1970)
Android at Arms (1971)
Bertie and May (1971)
Breed to Come (1972)
Garan the Eternal (1972)
Here Abide Monsters (1973)
Iron Cage (1974)
Outside (1974)
The Day of the Ness (1975)
Knave of Dreams (1975)
Merlin's Mirror (1975)
The White Jade Fox (1975)
Perilous Dreams (1976)
Wraiths of Time (1976)

The Opal-eyed Fan (1977)
Wolfshead (1977)
Velvet Shadows (1977)
Yurth Burden (1978)
Snow Shadow (1979)
Seven Spells to Sunday (1979)
Iron Butterflies (1980)
Ten Mile Treasure (1981)
Moon Called (1982)
Caroline (1982)
Wheel of Stars (1983)
Stand and Deliver (1984)
The House of Shadows (1984)
Serpent's Tooth (1987)
Imperial Lady: A Fantasy of Han China (1989)
The Jekyll Legacy (1990)
Sneeze on Sunday (1992)
The Mark of the Cat (1992)
Empire of the Eagle (1993)
The Hands of Lyr (1994)
Tiger Burning Bright (1995)
Mirror of Destiny (1995)
The Monster's Legacy (1996)
Scent of Magic (1998)
Quest Across Time (1999)
Wind in the Stone (1999)
Darkness and Dawn (2003)
The Duke's Ballad (2005)
Three Hands for Scorpio (2005)
A Taste of Magic (2006)