The first edition of Horses has the letters ABCD on page 160. © Copyright 1972 by Western Publishing Company, Inc. and The Ridge Press, Inc. Published by Golden Press, New York, N.Y. Cover price is $1.95. The number on the spine is 24346. Listed as a Golden Handbook Guide.
Horses was published as a Leisure Library edition. © Copyright 1972, 1974 by Western Publishing Company, Inc. and The Ridge Press, Inc. The size is 5 by 7 ½ inches. Cover price is $2.95. A first of this edition will have the letters ABCD on page 160. The contents are the same as the Golden Press editions. (image #2; not shown to scale.)
Two versions exist in a large (5 ¼ by 7 ¾ inch) hardcover. The first version has the same cover as the softcover. Number on the back cover is 64346. The second version has the same cover as the Leisure Library edition, without the words Leisure Library. The ISBN number on the back cover is 0-307-64346-8.
No revised edition exists. Out of print.