Reddit reviews The Horror in the Museum: A Novel

I believe The Horror in the Museum and Other Revisions contains his ghostwriting and collaboration work, though different editions might have differences in content, so you might have to look around a bit to find the most complete edition.

-EDIT-

I believe THIS is the most complete affordable edition.

Some really good suggestions here with Lair Barron, Nick Cutter, Tomas Ligotti, Ramsey Campbell.

Have you read The Horror in the Museum and other stories? I enjoyed a lot of these stories and I think it's a mixture of Lovecraft himself, a few ghostwritten stories and others just inspired by Lovecraft. I haven't personally had a chance to read Autumn Cthulhu but I've heard good things.

I can only speak to option C which is what I have.

https://www.amazon.ca/Horror-Museum-Novel-H-P-Lovecraft/dp/0345485726

• The Great God Pan by Arthur Machen
  
  
• The Hounds of Tindalos by Frank Belknap Long
  
  
• The Space Eaters by Frank Belknap Long
  
  
• The Mind Parasites by Colin Wilson
  
  
• The Black Stone by Robert E. Howard
  
  
• Worms of The Earth by Robert E. Howard
  
  
• The Thing on The Roof by Robert E. Howard
  
  
• People of The Dark by Robert E. Howard
  
  
• The Children of The Night by Robert E. Howard
  
  
• The Repairer of Reputations by Robert W. Chambers
  
  
• The Challenge From Beyond collaboration with Lovecraft
  
  It's also worth mentioning many of the stories in The Horror in the Museum were ghost written by Lovecraft but they are collaborations and most are not very good, although a few are worth a read.

They're in here, though.

This'll be buried, but I strongly recommend these (this's a picture of my Lovecraft collection) for a good combination of his complete fiction (including revisions & ghostwriting) and literary criticism / enthusiasm - his Supernatural Horror in Literature remains AFAIK the most authoritative overview of the genre from modernity to the first half of the 20th century.

The titles pictured are:

• The Horror in the Musem (his complete ghostwriting, revisions, & commissions; most purportedly "complete" editions of his fiction omits these stories, which is a shame, because works like The Mound and The Horror in the Museum are some of his best)
  
• The Annotated Supernatural Horror In Literature
  
• The Complete Fiction
  
  
• The New Annotated Lovecraft

I've been reading "The Horror in the Museum" which is stories that Lovecraft revised or rewrote for other writers. I've already read all his original stories and novellas but this material was all new for me.