Thanks for the information! I would love to see any list that you have. The Shadow Lord book must have been from the UK company Firecrest but it was slightly smaller in size.
Yep,
Shadow Lord was from Firecrest. The first 5 Gregg Press titles were the same smaller size; the next 2 batches were bigger. Firecrest went back to the smaller size for its final 6 titles.
Here are the titles, publisher, (very) approx. publication date and ISBN of titles I have in my collection (or have somewhat confirmed):
Star Trek Log One Aeonian Press 4/1975 0-88411-081-8
Star Trek Log Two Aeonian Press 4/1975 0-88411-082-6
Star Trek Log Three Aeonian Press 4/1975 0-88411-083-4
Star Trek Log Four Aeonian Press 4/1976 0-88411-084-2
Star Trek Log Five Aeonian Press 4/1976 0-88411-085-0
Star Trek Log Six Aeonian Press 4/1977 0-88411-086-9
Star Trek Log Seven Aeonian Press 4/1977 0-88411-087-7
Star Trek Log Eight Aeonian Press 4/1977 0-88411-088-5
Star Trek Log Nine Aeonian Press 4/1979 0-88411-089-3
Star Trek Log Ten Aeonian Press 4/1979 0-88411-090-7
The Wrath of Khan Macdonald 12/1982 0-356-08687-9
Web of the Romulans Firecrest 7/1984 0-85997-562-2
The Entropy Effect Firecrest 7/1984 0-85997-561-4
The Klingon Gambit Firecrest 7/1984 0-85997-563-0
Yesterday's Son Firecrest 7/1984 0-85997-560-6
The Final Reflection Firecrest 10/1985 0-85997-602-5
Corona Firecrest 10/1/1985 0-85997-601-7
Mutiny on the Enterprise Firecrest 10/1985 0-85997-604-1
The Covenant of the Crown Firecrest 10/1985 0-85997-605-X
Uhura's Song Firecrest 10/1985 0-85997-603-3
The Tears of the Singers Firecrest 6/1986 0-85997-635-1
Triangle Firecrest 6/1986 0-85997-634-3
The Wounded Sky Firecrest 6/1986 0-85997-632-7
Black Fire Firecrest 6/1986 0-85997-630-0
The Abode of Life Firecrest 6/1986 0-85997-631-9
The Prometheus Design Firecrest 6/1986 0-85997-633-5
Mindshadow Firecrest 9/1987 0-85997-923-7
Shadow Lord Firecrest 9/1987 0-85997-927-X
Ishmael Firecrest 9/1987 0-85997-924-5
Killing Time Firecrest 9/1987 0-85997-925-3
Pawns and Symbols Firecrest 9/1987 0-85997-926-1
Dwellers in the Crucible Firecrest 9/1987 0-85997-922-9
Web of the Romulans Gregg Press 8/1984 0-8398-2833-0
The Wrath of Khan Gregg Press 8/1984 0-8398-2832-2
The Klingon Gambit Gregg Press 8/1984 0-8398-2834-9
The Entropy Effect Gregg Press 8/1984 0-8398-2831-4
Yesterday's Son Gregg Press 8/1984 0-8398-2830-6
Star Trek III: The Search for Spock Gregg Press 1/1985 0-8398-2839-X
Corona Gregg Press 12/1985 0-8398-2889-6
The Covenant of the Crown Gregg Press 12/1985 0-8398-2886-1
Uhura's Song Gregg Press 12/1985 0-8398-2888-8
Mutiny on the Enterprise Gregg Press 12/1985 0-8398-2887-X
The Final Reflection Gregg Press 12/1985 0-8398-2885-3
The Prometheus Design Gregg Press 3/1986 0-8398-2936-1
The Abode of Life Gregg Press 3/1986 0-8398-2931-0
The Tears of the Singers Gregg Press 3/1986 0-8398-2932-9
Black Fire Gregg Press 3/1986 0-8398-2935-3
Triangle Gregg Press 3/1986 0-8398-2934-5
The Wounded Sky Gregg Press 3/1986 0-8398-2933-7
Star Trek White Lion 11/1974 0-85617-888-8
Star Trek 2 White Lion 5/1975 0-85617-898-5
Star Trek 3 White Lion 8/1975 0-85617-908-6
Star Trek 4 Severn House 1977 0-7278-0263-1
Star Trek 5 Severn House 1977 0-7278-0271-2
Star Trek 6 Severn House 1978 0-7278-0322-0
Star Trek 7 Severn House 1978 0-7278-0323-9
Star Trek 8 Severn House 1978 0-7278-0408-1
Star Trek 9 Severn House 1979 ?????
Star Trek 10 Severn House 1979 0-7278-0454-5
Star Trek 11 Severn House 1979 0-7278-0504-5
Star Trek 12 Severn House 1979 0-7278-0547-9
Star Trek Log Two Severn House 1982 0-7278-0820-6
Star Trek: The Motion Picture Severn House 1980 0-7278-0631-9
Star Trek III: The Search for Spock Severn House 6/1985 0-7278-1142-8
Star Trek IV: The Voyage Home Severn House 7/1987 0-7278-1519-9
Star Trek V: The Final Frontier Severn House 10/1989 0-7278-4021-5
Star Trek VI: The Undiscovered Country Severn House 6/1992 0-7278-4385-0