ISBN, Copyright Pages, and Dating Books — A Practical Reference

Reading the Book’s Birth Certificate

The copyright page is the book’s birth certificate — it contains (or should contain) every piece of information needed to identify what you’re holding: who published it, when, in what edition, and in what printing. But copyright pages are not standardized, conventions have changed over time, and publishers use inconsistent terminology. Learning to read them fluently is essential for anyone buying or selling books.

The Copyright Page: What to Look For

A typical modern copyright page contains:

Copyright Notice

“Copyright © 2024 by [Author Name]” establishes the year the copyright was registered and who holds it. Note:

• The copyright year is not always the publication year (a book copyrighted in 2023 might not be published until 2024)
• “Copyright © renewed” indicates a work originally published more than 28 years earlier that had its copyright renewed under the old (pre-1978) copyright system
• Multiple copyright dates may appear for revised editions or collections

Publisher Imprint

“Published by [Publisher Name], [City]” identifies the publisher. Note which imprint — Knopf, Vintage, Anchor, Pantheon, and Schocken are all different imprints of Penguin Random House but publish different types of books.

Edition Statement

“First Edition” or “First published [year]” — when present, this is the most straightforward indicator. But its absence does not mean the book is not a first edition; many publishers historically did not include edition statements.

Printing Number (Number Line)

The most reliable indicator of printing status for modern books (post-1970). See the detailed section below.

The Number Line System

The number line (also called “printer’s key” or “printing history”) is the modern standard for indicating print number:

Reading Number Lines

Standard format: 1 3 5 7 9 10 8 6 4 2

• The lowest number present indicates the printing
• For a first printing, “1” is present
• For a second printing, “1” has been removed: 3 5 7 9 10 8 6 4 2
• The numbers are arranged out of order so that removing one number from each end maintains a balanced line for aesthetic purposes

Variations:

• 1 2 3 4 5 6 7 8 9 10 (sequential — remove from left for each printing)
• 10 9 8 7 6 5 4 3 2 1 (reverse — lowest remaining = printing number)
• First printing, [Month Year] (explicit statement without number line)

Publisher-Specific Conventions

Different publishers use different systems:

Knopf (Alfred A. Knopf): “FIRST EDITION” stated, combined with number line. Both must be present for a true first printing — Knopf sometimes retains the “FIRST EDITION” statement in later printings while removing “1” from the number line.

Random House: Number line starting from 2 up. “FIRST EDITION” stated. “2 4 6 8 9 7 5 3 1” — look for the “1.”

Scribner’s (pre-1970): The famous “A” on the copyright page. A letter “A” indicates first printing. Removed for subsequent printings.

Harper / HarperCollins: “FIRST EDITION” plus number line. Some Harper books use “First edition” followed by the year in small type.

Farrar, Straus and Giroux: Number line. “First edition, [year]” or “First published in [year].”

Houghton Mifflin: Number line. Date on title page matches copyright date for first printing.

Putnam: “First American Edition” for imported titles, “First Edition” for domestic titles. Number line.

Viking / Penguin: “First published [year]” on UK editions. “First American Edition” on US editions of UK originals. Number line from 1970s forward.

Little, Brown: Number line. “FIRST EDITION” stated (modern). Older Little, Brown books (pre-1970) often have no clear first-edition statement.

Doubleday: Number line. “First Edition” stated. Note: Doubleday published many book club editions with identical text — check for Book Club markings.

Faber and Faber (UK): “First published in [year] by Faber and Faber Limited.” Subsequent printings listed: “Second impression [year].” If no impression line beyond the first, it’s a first printing.

Jonathan Cape (UK): “First published [year].” Reprints listed below: “Reprinted [year].” Clear and reliable.

Bloomsbury (UK): Number line. “First published in Great Britain in [year].” For Harry Potter, this is critical — the Bloomsbury firsts are the true firsts.

ISBN (International Standard Book Number)

What ISBNs Tell You

ISBN-10 (pre-2007): 10 digits, format X-XXX-XXXXX-X. The groups indicate language/country, publisher, title, and check digit.

ISBN-13 (2007–present): 13 digits, beginning with 978 or 979. Same structure as ISBN-10 but with a prefix.

What ISBNs Don’t Tell You

• An ISBN identifies an edition, not a printing. All printings of the same edition share one ISBN.
• Different formats (hardcover, paperback, ebook) have different ISBNs.
• A revised edition gets a new ISBN; a new printing of the same edition does not.
• ISBNs cannot tell you whether your copy is a first printing.

When ISBNs Help

• Distinguishing hardcover trade from book club editions (different ISBNs)
• Identifying specific editions of multi-edition works
• Confirming publisher and country of origin
• Research via ISBN databases (WorldCat, Library of Congress, Bowker)

Pre-ISBN Dating (Before 1970)

Books published before the ISBN system (adopted 1970 in English-speaking countries) must be dated through other evidence:

Publisher’s Catalog

Many publishers included a catalog of their titles at the rear of the book. The most recent titles listed provide a terminus post quem (earliest possible date) for the book’s printing.

Advertisements

Advertisements bound into the rear of some books (common in 19th and early 20th century) can be dated by their content.

Binding Style

Cloth color, stamping style, and binding construction evolved in datable ways. A book bound in publisher’s cloth of a style typical of the 1890s cannot have been published in the 1920s.

Typography

Typeface, layout conventions, and printing technology provide dating evidence. Linotype and Monotype composition became standard in the 1890s; phototypesetting replaced metal type in the 1960s–1970s; digital composition became standard in the 1990s.

Common Pitfalls

”First Edition” Doesn’t Always Mean First Printing

Some publishers retain the “First Edition” statement in subsequent printings, changing only the number line. Always check the number line if one is present — it overrides the textual statement.

Copyright Date vs Publication Date

A copyright date is not necessarily a publication date. Manuscript copyright may precede publication by years. Always look for explicit publication statements.

Dust Jacket Mismatch

Dust jackets from later printings can end up on first-printing copies (through library binding, used book handling, or deliberate misrepresentation). If the jacket lists reviews that appeared after the publication date, it may be a later-printing jacket on an earlier-printing book.

The “Book Club Edition” Trap

Book club editions are often printed from the same plates as trade editions and may even have the same copyright page. Distinguishing markers:

• Absence of price on jacket flap
• “Book Club Edition” printed on jacket or board
• Blind stamp (circular depression) on rear board
• Sometimes slightly smaller dimensions
• Different paper quality (lighter weight)
• No ISBN, or a different ISBN

Quick Reference: Is It a First Printing?

1. Check for “First Edition” or “First Printing” statement
2. Check number line — is “1” present?
3. Check for absence of “Second printing” or reprint notices
4. For pre-1970 books, check publisher-specific conventions
5. Verify jacket matches (price, reviews, ads consistent with publication date)
6. Compare to known bibliographic descriptions (consult dealer databases, auction records, bibliographies)

When in doubt, consult a specialized bibliography for the author or publisher. Major authors have dedicated bibliographies listing exact identification points for every title.