Quick answer
A first edition of The Cat Who Walks Through Walls by Robert A. Heinlein (G.P. Putnam's Sons, 1985) is identified by: Copyright page carries a complete descending number line ending in 1. The U.S.
Checklist — a true first has these:
- Copyright page carries a complete descending number line ending in 1P-026833
- First-issue jacket is unclipped with the original printed priceP-026834
- The earliest printing is also noted to carry the full text of the third line on page 300, present without an errata slipP-026835
- Publisher imprint reads G.P. Putnam's Sons
- Not a book-club edition (see below)
| Author | Robert A. Heinlein |
|---|---|
| Publisher | G.P. Putnam's Sons |
| Year | 1985 |
| True first | — |
| Format | Hardcover (trade) |
| Key point | Copyright page carries a complete descending number line ending in 1 |
| Book-club edition exists? | Yes |
The points of issue
- Copyright page carries a complete descending number line ending in 1
- First-issue jacket is unclipped with the original printed price
- The earliest printing is also noted to carry the full text of the third line on page 300, present without an errata slip
How G.P. Putnam's Sons marked a first edition
- PRE-1928 (early independent house): Putnam printed NO first-edition statement. Identify a first by matching the copyright-page year to the title-page year with no reprint/later-printing notice on the copyright page. Afte…
- NUMBER-LINE ADOPTION (CONTESTED DATE): Putnam moved to a printer's-key number line on the copyright page. A complete ascending line 1 2 3 4 5 6 7 8 9 10 (all ten numerals present, lowest = 1) indicates a first printing,…
Full G.P. Putnam's Sons first-edition guide →
How to verify your copy, step by step
- Find the copyright page — the verso (back) of the title page.
- Read the number line — the lowest number is the printing. A line including 1 is a first printing (Random House deliberately ends at 2). Paste it into the decoder.
- Rule out a book-club edition — a blind-stamp on the rear board or a jacket with no printed price marks a book-club copy.
- Photograph four things — the front cover, spine, title page, and copyright page — the standard record for identification.
The dust jacket
For a collectible first edition the dust jacket matters as much as the book. Confirm the jacket is present and unclipped — the printed price should still be at the corner of the flap (a clipped corner or a price-less flap can indicate a book-club issue). First-state jackets can differ from later ones in the cover art, blurbs, or review quotations; where a specific first-state jacket point is known for this title it is noted above.
Binding & format
Where multiple bindings exist, the hardcover trade issue is usually (but not always) the precedence copy — confirm against the points above. Later printings often show cheaper cloth, thinner boards, or simplified spine stamping. A simultaneous signed or limited issue, when one exists, is a distinct state from the trade first.
Is this the true first?
The U.S. Putnam hardcover of 1985 is the true first edition.P-026836
Telling it from reprints & book-club editions
Book club edition lacks the printed jacket price and is identified by a blind stamp on the rear board; smaller and lighter than the trade first.P-026837
Frequently asked questions
Is my copy of The Cat Who Walks Through Walls a first edition?
A first edition of The Cat Who Walks Through Walls by Robert A. Heinlein (G.P. Putnam's Sons) is identified by: Copyright page carries a complete descending number line ending in 1.
How do I tell the first printing from a later one?
Check the copyright page. A number line whose lowest number is 1 marks a first printing (Random House ends at 2). The U.S.
Is the book-club edition the same as the first?
Book club edition lacks the printed jacket price and is identified by a blind stamp on the rear board; smaller and lighter than the trade first.
I have a first edition of The Cat Who Walks Through Walls — what should I do?
First, document the copy: photograph the copyright page (the number line and any edition statement) and the dust-jacket flap — an unclipped, priced jacket matters. Confirm the points of issue above against your copy, and use the free First Edition Checker to decode the printing. To sell, the author’s collecting guide covers the market. And if you are clearing books in the Albuquerque area, the New Mexico Literacy Project offers free pickup, any condition, and makes sure collectible copies are identified rather than discarded.
Glossary
- First edition
- Every copy printed from the first setting of type. Collectors usually want the first edition, first printing (the true first).
- First printing / impression
- A single press run from that setting. The first printing is the earliest and most desirable; later printings are still the first edition but not the true first.
- Number line (printer's key)
- A row of numbers on the copyright page (e.g. 10 9 8 7 6 5 4 3 2 1). The lowest number present is the printing — a line including 1 marks a first printing (Random House deliberately ends at 2).
- Points of issue
- Specific physical details — a stated edition, a number line, a typo, a jacket state — that identify the true first printing.
- Book-club edition (BCE)
- A reprint made for a book club. Tells include a blind-stamped dot or square on the rear board and a dust jacket with no printed price. Not the true first.
- First thus
- The first appearance of a particular version (first paperback, first illustrated, first U.S. printing) — a first of that kind, not the first edition of the work.
Related first editions
How to cite this page
New Mexico Literacy Project. “Is The Cat Who Walks Through Walls by Robert A. Heinlein a First Edition? Points of Issue.” NMLP First-Edition Identification Reference. Reviewed 4 July 2026. Retrieved from https://newmexicoliteracyproject.org/first-edition/the-cat-who-walks-through-walls. Licensed CC BY 4.0 — part of the open Canonical First-Edition Points of Issue dataset (DOI 10.5281/zenodo.21184548).