The points of issue
Ace Double D-286 paperback original, bound dos-a-dos with Across Time by David Grinnell (pseudonym of Donald A. Wollheim). Emsh cover art. Expanded from We, the Marauders (Science Fiction Quarterly, February 1958).
Is this the true first?
US Ace Double paperback original is the true first book appearance.
Telling it from reprints & book-club editions
No book club edition.
Frequently asked questions
Is my copy of Invaders from Earth a first edition?
Look for these first-edition points: Ace Double D-286 paperback original, bound dos-a-dos with Across Time by David Grinnell (pseudonym of Donald A. Wollheim). Emsh cover art. Expanded from We, the Marauders (Science Fiction Quarterly, February 1958).
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 Double paperback original is the true first book appearance.
Is the book-club edition the same as the first?
No book club edition.
I have a first edition of Invaders from Earth — 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.