I'm kind of amazed but, looking over his ISFDB bibliography, I can only recall having read probably both the
Alien(s) books and definitely
Season of the Spellsong (the first three Spellsinger books) and possibly the next set. I also might have checked out one of those
Star Trek Log books from the library but that may have been some other ST book by someone else. Like you kind of hint or wonder, Bick, I suppose it's possible I had the
Black Hole novelization - I have the faintest feeling I might have - but why? I hated the movie. Maybe hoping the book would be better? But I could have sworn a good chunk of shelfspace was taken up by Foster at one point (though I don't currently own any). I think of him as being one of those authors I read back in the day. Maybe I've forgotten some.
This thread got me kind of curious about what I'd do if I did give him another look, so I played with his bibliography and tried to clear out the underbrush to see what he'd actually done. I'll append a couple of lists to the end of this which kind of go along with the following:
As far as what happened to him, I think it might be a couple of things: yes, he's written so many ties that his reputation is mostly "a tie writer". Also, he's written so much (eight novels in 1984 alone (one every six or seven weeks!) and, from 1972-2010, usually writing multiple titles and never skipping a single year) that nobody can keep up with him and I think many people just lose track of him altogether. "Oh, another ADF. Maybe I'll pick up the next one." Also, he just doesn't seem to have had much success lately. I read a review of
Sagramanda which portrayed it as a sort of breakout SF novel with literary ambitions but I don't think it sold and it was the last singleton he's written (2006). Other than the Icerigger trilogy (which is itself part of the larger Humanx series) he'd never written anything that stayed a trilogy but, beginning in 1991, he's written four trilogies that don't seem to have done much and none of his singletons (books which remained that way starting in 1983) ever have. So basically he's known for a giant SF series that may have been written into the ground and a fantasy series that seems to have exhausted itself, too.
As far as individual titles he's known for, the books I hear of the most and most favorably are
The Tar-Aiym Krang,
Icerigger (though I think the whole trilogy is well-regarded),
Midworld and, among the ties,
Splinter of the Mind's Eye. All of these were 70s titles. And he had apparently great commercial success with the first several Spellsinger books, but those were basically 80s titles. Not as much since.
Anyway - to preserve spacing and so people who aren't interested won't have to scroll as much, here's some "code" of his stuff by type ordered by publication and another list of everything just in a single ordered list with little series abbreviations or '*' tie markers. He's written almost thirds of Humanx/ties/everything else with the Humanx series actually the "smallest third" and ties bigger than that.
Code:
HUMANX (28)
Pip & Flinx
The Tar-Aiym Krang (1972)
Bloodhype (1973)
The End of the Matter (1977)
Orphan Star (1977)
For Love of Mother-Not (1983)
Flinx in Flux (1988)
Mid-Flinx (1995)
Reunion (2001)
Flinx's Folly (2003)
Sliding Scales (2004)
Running from the Deity (2005)
Trouble Magnet (2006)
Patrimony (2007)
Flinx Transcendent (2009)
Icerigger Trilogy
Icerigger (1974)
Mission to Moulokin (1979)
The Deluge Drivers (1987)
Humanx (general)
Midworld (1975)
Cachalot (1980)
Nor Crystal Tears (1982)
Voyage to the City of the Dead (1984)
Sentenced to Prism (1985)
The Howling Stones (1997)
Drowning World (2003)
Quofum (2008)
The Founding of the Commonwealth
Phylogenesis (1999)
Dirge (2000)
Diuturnity's Dawn (2002)
SPELLSINGER (8 fantasy)
Spellsinger (1983)
The Hour of the Gate (1983)
The Day of the Dissonance (1984)
The Moment of the Magician (1984)
The Paths of the Perambulator (1985)
The Time of the Transference (1986)
Son of Spellsinger (1993)
Chorus Skating (1994)
LATE TRILOGIES
The Damned
A Call to Arms (1991)
The False Mirror (1992)
The Spoils of War (1993)
Journeys of the Catechist
Carnivores of Light and Darkness (1998)
Into the Thinking Kingdoms (1999)
A Triumph of Souls (2000)
The Taken Trilogy
Lost and Found (2004)
The Light-years Beneath My Feet (2005)
The Candle of Distant Earth (2006)
The Tipping Point
The Human Blend (2010)
Body, Inc. (2012)
The Sum of Her Parts (2012)
SINGLETONS (19)
The Man Who Used the Universe (1983)
Slipt (1984)
The I Inside (1984)
Into the Out Of (1986)
Glory Lane (1987)
Maori (1988)
To the Vanishing Point (1988)
Quozl (1989)
Cyber Way (1990)
Cat-A-Lyst (1991)
Codgerspace (1992)
Greenthieves (1994)
Parallelities (1995)
Life Form (1995)
Jed the Dead (1997)
Kingdoms of Light (2001)
Interlopers (2001)
The Mocking Program (2002)
Sagramanda (2006)
TIES AND/OR COLLABORATIONS (33)
Luana (1974)
Dark Star (1974)
Star Trek Log Seven (1976)
Star Trek Log Eight (1976)
Star Trek Log Nine (1977)
Star Trek Log Ten (1978)
Splinter of the Mind's Eye (1978)
The Black Hole (1979)
Alien (1979)
Clash of the Titans (1981)
Outland (1981)
The Thing (1982)
Krull (1983)
Shadowkeep (1984)
The Last Starfighter (1984)
Starman (1984)
Aliens (1986)
Alien Nation (1988)
Alien 3 (1992)
Design for Great-Day (1995) with Eric Frank Russell
Voyage of the Bassett (1996) w/James C. Christensen & Renwick St. James
The Dig (1996)
Dinotopia Lost (1996)
The Hand of Dinotopia (1999)
The Approaching Storm (2002)
The Chronicles of Riddick (2004)
Ghosts of Yesterday (2007)
Transformers (2007)
Terminator Salvation: The Official Movie Novelization (2009)
Star Trek (2009)
The Veiled Threat (2009)
Revenge of the Fallen (2009)
Into Darkness (2013)
-----------
Single list
-----------
H-P The Tar-Aiym Krang (1972)
H-P Bloodhype (1973)
* Luana (1974)
H-I Icerigger (1974)
* Dark Star (1974)
H-H Midworld (1975)
* Star Trek Log Seven (1976)
* Star Trek Log Eight (1976)
H-P The End of the Matter (1977)
* Star Trek Log Nine (1977)
H-P Orphan Star (1977)
* Star Trek Log Ten (1978)
* Splinter of the Mind's Eye (1978)
* The Black Hole (1979)
H-I Mission to Moulokin (1979)
* Alien (1979)
H-H Cachalot (1980)
* Clash of the Titans (1981)
* Outland (1981)
* The Thing (1982)
H-H Nor Crystal Tears (1982)
* Krull (1983)
SS Spellsinger (1983)
SS The Hour of the Gate (1983)
H-P For Love of Mother-Not (1983)
1 The Man Who Used the Universe (1983)
* Shadowkeep (1984)
1 Slipt (1984)
SS The Day of the Dissonance (1984)
1 The I Inside (1984)
* The Last Starfighter (1984)
H-H Voyage to the City of the Dead (1984)
SS The Moment of the Magician (1984)
* Starman (1984)
H-H Sentenced to Prism (1985)
SS The Paths of the Perambulator (1985)
* Aliens (1986)
SS The Time of the Transference (1986)
1 Into the Out Of (1986)
1 Glory Lane (1987)
H-I The Deluge Drivers (1987)
* Alien Nation (1988)
1 Maori (1988)
H-P Flinx in Flux (1988)
1 To the Vanishing Point (1988)
1 Quozl (1989)
1 Cyber Way (1990)
1 Cat-A-Lyst (1991)
TD A Call to Arms (1991)
* Alien 3 (1992)
TD The False Mirror (1992)
1 Codgerspace (1992)
SS Son of Spellsinger (1993)
TD The Spoils of War (1993)
SS Chorus Skating (1994)
1 Greenthieves (1994)
* Design for Great-Day (1995) with Eric Frank Russell
1 Parallelities (1995)
1 Life Form (1995)
H-P Mid-Flinx (1995)
* Voyage of the Bassett (1996) w/James C. Christensen & Renwick St. James
* The Dig (1996)
* Dinotopia Lost (1996)
1 Jed the Dead (1997)
H-H The Howling Stones (1997)
JC Carnivores of Light and Darkness (1998)
JC Into the Thinking Kingdoms (1999)
* The Hand of Dinotopia (1999)
H-F Phylogenesis (1999)
JC A Triumph of Souls (2000)
H-F Dirge (2000)
1 Kingdoms of Light (2001)
1 Interlopers (2001)
H-P Reunion (2001)
* The Approaching Storm (2002)
H-F Diuturnity's Dawn (2002)
1 The Mocking Program (2002)
H-H Drowning World (2003)
H-P Flinx's Folly (2003)
* The Chronicles of Riddick (2004)
TTT Lost and Found (2004)
H-P Sliding Scales (2004)
TTT The Light-years Beneath My Feet (2005)
H-P Running from the Deity (2005)
TTT The Candle of Distant Earth (2006)
1 Sagramanda (2006)
H-P Trouble Magnet (2006)
* Ghosts of Yesterday (2007)
* Transformers (2007)
H-P Patrimony (2007)
H-H Quofum (2008)
* Terminator Salvation: The Official Movie Novelization (2009)
* Star Trek (2009)
* The Veiled Threat (2009)
H-P Flinx Transcendent (2009)
* Revenge of the Fallen (2009)
TTP The Human Blend (2010)
TTP Body, Inc. (2012)
TTP The Sum of Her Parts (2012)
* Into Darkness (2013)