A first edition is the first appearance of a text in print — but the phrase is slippery, and the title page is the least reliable witness in the room. Publishers reprinted freely and relabelled carelessly; the marks that matter are elsewhere, learned point by point, book by book.
The number line
Open the copyright page and look for a row of numerals — the printer’s key. A line reading “10 9 8 7 6 5 4 3 2 1” that runs down to a “1” indicates a first printing; a lowest number of “2” or higher marks a later run, whatever the title page claims. Conventions differ by house and by era, which is precisely why the collector learns each publisher’s habits rather than trusting a single rule.
Issue points
Beyond the printing, a true first is fixed by “points” — the small, specific features of the earliest state: a typo corrected in later runs, a cancelled leaf, a particular advertisement bound at the rear, a map present or absent. A famous point can turn two apparently identical books into objects worth a hundredfold difference. These are recorded in the bibliographies, and the serious buyer collates against them before parting with a sou.
The dust jacket
For modern firsts, the jacket often carries more value than the book beneath it, and it carries its own points — the correct price unclipped at the corner, the right blurbs, the earliest state of the artwork. A first-edition book in a later-issue jacket is a marriage, not a first. Learn to read the jacket as carefully as the copyright page.
Provenance and honesty
Finally, weigh the dealer’s description as much as the book. A reputable house states edition, issue, condition and any restoration plainly, and stands behind it. Certified provenance — an unbroken account of where a copy has been — is worth paying for, because in this field the difference between a treasure and a disappointment is often a single, quietly recorded fact.