The points of issue
Ace single full-length paperback original, D-211 (an 'Ace Double-Size Book,' i.e. a single novel rather than a dos-a-dos Double); cover art by Ed Valigursky.
Is this the true first?
US Ace paperback original is the true first; never serialized or issued in hardcover prior.
Telling it from reprints & book-club editions
No book club edition; paperback original only.
Frequently asked questions
Is my copy of Eye in the Sky a first edition?
Look for these first-edition points: Ace single full-length paperback original, D-211 (an 'Ace Double-Size Book,' i.e. a single novel rather than a dos-a-dos Double); cover art by Ed Valigursky.
How do I tell the first printing from a later one?
Check the copyright page for the publisher's first-printing convention and confirm the points above. US Ace paperback original is the true first; never serialized or issued in hardcover prior.
Is the book-club edition the same as the first?
No book club edition; paperback original only.
I have a first edition of Eye in the Sky — what should I do?
If you're clearing books, New Mexico Literacy Project offers free pickup in Albuquerque, any condition, and makes sure collectible copies aren't lost. To sell, see the author's collecting guide. Either way, nothing valuable ends up in a landfill.