Sorry if this is in the wrong forum. I wasn't sure.
I have been collection Chaosium's fiction books, but didn't keep up with them a few years back, so I have some gaps. This is my list so hope folks could help out. Would also be interested in learning what books were planned for Chaosium that went elsewhere (am aware of a few).
6001 The Hastur Cycle (1st ed) #1
6002 Robert Bloch's Mysteries of the Worm #2
6003 Cthulhu's Heirs #3
6004 The Shub-Niggaruth Cycle #4
6005 Cthulhu Cycle #11
6006 The Azathoth Cycle #6
6007 Encyclopedia Cthulhiana #5
6008 The Book of Iod #7
6009 Made in Goatswood #8
6010 The Dunwich Cycle #9
6011 The Disciples of Cthulhu (new ed) #10
6012 The Necronomicon #12
6013 The Xothic Legend Cycle #13
6014 Singers of Strange Songs #15
6015 The Scroll of Thoth #16
6016 The Complete Pegana
6017 The Innsmouth Cycle #17
6018 Nightmare's Disciple #19
6019 The Nyarlathotep Cycle #14
6020 The Hastur Cycle (2nd ed) #1
6021 The Ithaqua Cycle #18
6022 Encyclopedia Cthulhiana (2nd ed)
6023 The Yellow Sign and Other Tales (#23)
6024 Tales Out of Innsmouth #21
6025 Other Nations [went to another publisher??, if so who?]
6026 Book of Eibon (#26)
6027 The Book of Dzyan (#22)
6028 Nameless Cults- Robert E Howard (#24)
6029 Tsathoggua Cycle
6030 The Three Impostors & Other Stories- Arthur Machen v1
6031 Antarktos Cycle #20
6032 Song of Cthulhu (#25)
6033 The Disciples of Cthulhu II
6034 The Necronomicon, 2nd edition
6035 The White People and Other Tales- Arthur Machen v2
6036 The Terror and Other Tales- Arthur Machen v3
6037 Mysteries of the Worm (3rd edition)
6038 Arkham Tales
6039 Antarktos Cycle (2nd edition)
6040 The Spiraling Worm
6041 Frontier Cthulhu
6042 The Strange Cases of Rudoph Pearson
6043 Voodoo Virus
6044 Cthulhu's Dark Cults
6045 R'lyeh Rising
6046 The Klarkas-Ton Cycle
6047 The Yith Cycle
6048 Eldritch Evolutions
6049
6050
6051 Undead & Unbound
6052 Eldritch Chrome
6053
6054 Steampunk Cthulhu
6055 Extreme Planets
6056 Once Upon an Apocalypse
6057 Madness on the Orient Express
6058 Sisterhood - Dark Tales & Secret Histories
6059
6060 Goat Mother and Others
6061 Edge of Sundown
6062 Mark of the Beast
6063 Legacy of the Reanimator
6064 Cassilda's Song
6065
planned:
Dagon & Lazarus
Tindalos Cycle (went to Hippocampus Press)
Celaeno Fragments: Tales of the Derleth Mythos (never happened)
Tales Out of Dunwich (went to Hippocampus Press)
Sesqua Valley Cycle (never happened?)
The Yog-Sothoth Cycle (never happened)
