S. T. Joshi's anthology of Cthulhu Mythos fiction, Spawn of the Green Abyss, by Mythos Books. Spawn of the Green Abyss is an anthology of S. T.'s "favorite" Cthulhu Mythos tales...
"The House of the Worm," by Mearle Prout
"Far Below," by Robert Barbour Johnson
"Spawn of the Green Abyss," by C. Hall Thompson
"The Deep Ones," by James Wade
"The Franklyn Papers," by Ramsey Campbell
"Where Yidhra Walks," by Walter C, DeBill, Jr.
"Black Man with a Horn," by T. E. D. Klein
"Nethescurial," by Thomas Ligotti
"Black Brat of Dunwich," by Stanley C. Sargent
"The Phantom of Beguilement," by W. H. Pugmire
"...Hungry...Rats," by Joseph S. Pulver, Sr. (original to this edition)
"Virgin's Island," by Donald Tyson (original to this edition)
"In the Shadow of Swords," by Cody Goodfellow (original to this edition)
yep. new one by me. delighted!! ! yes, it's a sequel to HPL's "Rats"...