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First-Edition Identification · E.L. Konigsburg

Is My The Mixed-Up Files of Mrs. Basil E. Frankweiler a First Edition?

Atheneum, 1967 · Children's / illustrated

Last reviewed 3 July 2026 · CC BY 4.0

Quick answer

A first edition of The Mixed-Up Files of Mrs. Basil E. Frankweiler by E.L. Konigsburg (Atheneum, 1967) is identified by: Copyright page states 'First Edition' with no later-printing statement (Atheneum used a stated 'First Edition' in this era and did not adopt a number line until the mid-1980s). US Atheneum first.

Checklist — a true first has these:

AuthorE.L. Konigsburg
PublisherAtheneum
Year1967
True firstUS edition
FormatChildren's / illustrated
Key pointAtheneum first, 1967
Book-club edition exists?Yes

The points of issue

Decode the printer’s key: paste the number line into the decoder.

How to confirm the first-printing statement

Publishers stated first printings differently by era. The decisive tells are a printed “First Edition/First Printing” statement, a number line whose lowest number is 1 (Random House ends at 2), or a dated first printing with no later printings listed. Paste your copyright page into the number-line decoder.

How to verify your copy, step by step

  1. Find the copyright page — the verso (back) of the title page.
  2. Confirm the first-edition statement — look for “First Edition,” “First Printing,” or the publisher’s equivalent wording.
  3. 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.
  4. Verify this is the US true first — not a later-market or reprint edition.
  5. 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.
  6. 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?

US Atheneum first. Newbery Medal 1968; the first-state jacket predates the seal. Full title on the book is 'From the Mixed-Up Files of Mrs. Basil E. Frankweiler.' Among Konigsburg's two debut titles, both published by Atheneum in 1967.

Telling it from reprints & book-club editions

Book-club editions lack the printed price jacket price, often add a Newbery Medal seal to the jacket, and typically show a blind-stamped dot or circle on the rear board that is standard for period BCEs.

Frequently asked questions

Is my copy of The Mixed-Up Files of Mrs. Basil E. Frankweiler a first edition?

A first edition of The Mixed-Up Files of Mrs. Basil E. Frankweiler by E.L. Konigsburg (Atheneum) is identified by: Copyright page states 'First Edition' with no later-printing statement (Atheneum used a stated 'First Edition' in this era and did not adopt a number line until the mid-1980s).

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). US Atheneum first.

Is the book-club edition the same as the first?

Book-club editions lack the printed price jacket price, often add a Newbery Medal seal to the jacket, and typically show a blind-stamped dot or circle on the rear board that is standard for period BCEs.

I have a first edition of The Mixed-Up Files of Mrs. Basil E. Frankweiler — what should I do?

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 lost. To sell, see the author’s collecting guide. Either way, nothing collectible ends up in a landfill.

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 Mixed-Up Files of Mrs. Basil E. Frankweiler by E.L. Konigsburg a First Edition? Points of Issue.” NMLP First-Edition Identification Reference. Reviewed 3 July 2026. Retrieved from https://newmexicoliteracyproject.org/first-edition/the-mixed-up-files-of-mrs-basil-e-frankweiler. Licensed CC BY 4.0 — part of the open Canonical First-Edition Points of Issue dataset.

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