
He was a comic book and pulp magazine editor, and a science fiction agent and prominent fan. In 1932, Schwartz co-published (with Mort Weisinger and Forrest J. Ackerman) Time Traveller, one of the first science fiction fanzines. Schwartz and Weisinger also founded the Solar Sales Service literary agency (1934–1944) where Schwartz represented such writers as Alfred Bester, Stanley G. Weinbaum, Robert Bloch, Ray Bradbury, and H. P. Lovecraft, including some of Bradbury's first published work and Lovecraft's last. In addition, Schwartz helped organize the first World Science Fiction Convention in 1939. In 1944 he became an editor at All-American Comics, one of the companies that evolved into DC Comics.
Series
Books

Wonder Woman (1942-1986) #109
1959

Justice League of America (1960-1987) #38
1965

Justice League of America (1960-1987) #114
1974

Justice League of America (1960-1987) #116
1975

Justice League of America (1960-1987) #33
1965

The Flash (1959-1985) #156
1965

Wonder Woman (1942-1986) #98
1958

The Flash (1959-1985) #150
1965

Wonder Woman (1942-1986) #100
1958

Wonder Woman (1942-1986) #76
1955

Justice League of America (1960-1987) #112
1974

Wonder Woman (1942-1986) #112
1960

Justice League of America (1960-1987) #115
1975

Wonder Woman (1942-1986) #106
1959

The DC Comics Rarities Archives, Vol. 1
2005

Wonder Woman (1942-1986) #99
1958

Wonder Woman (1942-1986) #108
1959

Wonder Woman (1942-1986) #129
1962

Wonder Woman (1942-1986) #107
1959

Batman (1940-2011) #169
1965

Wonder Woman (1942-1986) #114
1960

Wonder Woman (1942-1986) #118
1960

Wonder Woman (1942-1986) #103
1959

The Flash (1959-1985) #151
1965

Wonder Woman (1942-1986) #117
1960

Wonder Woman (1942-1986) #101
1958

Wonder Woman (1942-1986) #104
1959

Batman (1940-2011) #170
1965

Detective Comics (1937-2011) #338
1965