Wonder eBooks is now publishing many eBooks that are available at:

Fictionwise (numerous formats)

Amazon (for the Kindle)

FEATURING GREAT SF AUTHORS:
Poul Anderson
Isaac Asimov
James Blish
Robert Bloch
Leigh Brackett
Ray Bradbury
Hal Clement
Lester del Rey
Philip K. Dick
Gordon R. Dickson
Philip José Farmer
James Gunn
Frank Herbert
Damon Knight
Keith Laumer
Fritz Leiber
Ward Moore
Andre Norton
Frederic Pohl
Robert Sheckley
Cordwainer Smith
Theodore Sturgeon
Jack Williamson

NOIR MASTER SERIES from Wonder eBooks
featuring great vintage hard-boiled stories from the best writers.
Some of the GREAT AUTHORS featured:

Fredric Brown
Howard Browne
Jonathan Craig
Bruno Fischer
David Goodis
Henry Kane
Day Keene
Ross Macdonald
Ed McBain
Mickey Spillane
Jim Thompson