The four I've got are:
1. Gothic Classics
Five great tales of terror, danger and romance by the original creators of gothic literature:
JANE AUSTEN Northanger Abbey
ANNE RADCLIFFE The Mysteries of Udolpho
J. SHERIDAN LE FANU Carmilla
EDGAR ALLAN POE The Oval Portrait
MYLA JO CLOSSER At the Gate
Plus a rare poem by Jane Austen, illustrated by Molly Kiely
With a dramatic cover painting by Lisa K. Weber
2. H.P. Lovecraft
The Shadow Over Innsmouth — one of HPL's greatest stories,
Dreams in the Witch-House — witchcraft, mathematics and a talking rat
Sweet Ermengarde — a rare Lovecraft comedy,
Herbert West: Reanimator — presented in four chapters
The Cats of Ulthar — illustrated by Lisa K. Weber
The Terrible Old Man — illustrated by Onsmith Jeremi
The Shadow Out of Time — adapted and illustrated by Matt Howarth
3.Horror Classics
EDGAR ALLAN POE Some Words with a Mummy
H.P. LOVECRAFT The Thing on the Doorstep
SAKI The Open Window
W.W. JACOBS The Monkey's Paw
BRET HARTE Selina Sedilia
JACK LONDON Keesh, Son of Keesh
OLIVE SCHREINER In a Far-Off World
HOWARD GARIS Professor Jonkin's Cannibal Plant
HONORE DE BALZAC The Thing at Ghent
FITZ-JAMES O'BRIEN A Day Dream
AMBROSE BIERCE The Mummy
CLARK ASHTON SMITH The Beast of Averoigne
4. Adventure Classics
SAX ROHMER Valley of the Sorceress
ALEXANDRE DUMAS The Masked Ball
RAFAEL SABATINI Blood Money
RUDYARD KIPLING Gunga Din
DAMON RUNYON Two Men Named Collins
JOHNSTON McCULLEY The Stolen Story
ZANE GREY Tigre
EDITH NESBIT The Mystery of the Semi-Detached
ROBERT W. SERVICE The Shooting of Dan McGrew
FITZ-JAMES O'BRIEN The Man Without a Shadow
ARTHUR CONAN DOYLE The Crime of the Brigadier
O. HENRY The Roads We Take