The Black Stallion Series - 20 Book Set by Walter Farley

Title:  The Black Stallion Series:  20 Volume Set
Format:  Paperback
Author:  Walter Farley
Illustrator:  none listed - no illustrations within the pages, only the cover art on each book
Year:  see below
Publisher:  Random House - New York
Length: Various Pages
Dimensions: " wide by " tall
Condition:  Cover and spine wear noted especially around the edges - these editions have been well-read over the years & their covers & spines show that wear & love.   Some of these editions have not writing in them at all.  Others have inscriptions, names & checkmarks on the book list pages.  No missing pages noted.  

Titles Include (in series order):
The Black Stallion - 1941 (1969)
The Black Stallion Returns - 1945 (1973)
Son of the Black Stallion - 1947 (1975)
The Island Stallion - 1948 (1976)
The Black Stallion & Satan - 1949 (1977)
The Black Stallion's Blood Bay Colt - 1950 (1978)
The Island Stallion's Fury - 1951 (1979)
the Black Stallion's Filly - 1952 (1983)
The Black Stallion Revolts - 1953
The Black Stallion's Sulky Colt - 1954
The Black Stallion Races - 1955
The Black Stallion's Courage - 1956
The Black Stallion Mystery - 1957
The Horse-Tamer - 1958
The Black Stallion and Flame - 1960
Man O-War - 1962
The Black Stallion Challenged! - 1964
The Black Stallion's Ghost - 1969
The Black Stallion and the Girl - 1971
The Black Stallion Legend - 1983

Even though the copyrights listed above are what is stated on the copyright pages of each book, I believe these editions may have all been published in the 1970's & 1980's.  These are the versions I read as a child growing up in the late 1970's/early 1980's.