The points of issue
True first appearance is the 1951 World Editions digest-sized paperback, issued as Galaxy Science Fiction Novel No. 3. The UK Sidgwick and Jackson hardcover followed in 1953, and the US Gnome Press hardcover and a Ballantine paperback both appeared in 1954.
Is this the true first?
The US World Editions Galaxy Novel paperback (1951) is the true first edition. The Sidgwick and Jackson UK hardcover (1953) is the first hardcover; the Gnome Press US hardcover dates to 1954, not 1951 or earlier.
Telling it from reprints & book-club editions
No book club edition. Later reprints carry different imprints and pagination.
Frequently asked questions
Is my copy of Prelude to Space a first edition?
Look for these first-edition points: True first appearance is the 1951 World Editions digest-sized paperback, issued as Galaxy Science Fiction Novel No. 3. The UK Sidgwick and Jackson hardcover followed in 1953, and the US Gnome Press hardcover and a Ballantine paperback both appeared in 1954.
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. The US World Editions Galaxy Novel paperback (1951) is the true first edition. The Sidgwick and Jackson UK hardcover (1953) is the first hardcover; the Gnome Press US hardcover dates to 1954, not 1951 or earlier.
Is the book-club edition the same as the first?
No book club edition. Later reprints carry different imprints and pagination.
I have a first edition of Prelude to Space — 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.