What makes a book rare? A bookseller answers
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You've called on a bookseller to appraise your library. In the room, his gaze slides over the leather of the legal and medical treatises you thought so rare. He's already elsewhere: a few slim booklets from the 1930s, plain covers, tucked away at the end of a shelf. He picks them up, turns them over, stops at one of them. Inscriptions in ink. A quick pencil sketch in the margin. Someone held this book close.
The bookseller says nothing more, he sees. But what did he see?
A rare book is the product of an equation, not a qualification dropped from the sky. Five factors make it up: original print run, destruction, provenance, condition, market demand. The more these accumulate, the more the value increases.
To understand what the term "antique book" specifically means in the profession: What is an antique book?
Original print run: the primary factor of a rare book
The clearest factor: the number of copies printed. For a first work by an anonymous author suddenly touched by fame, posthumous or not, rarity is first calculated on this figure. The first poetry pamphlets by Francis Jammes, printed in 50 copies not for commercial sale, are obviously rare.
The logic also applies to special limited editions. Julien Gracq's Le Rivage des Syrtes, published by José Corti on September 25, 1951: 40 numbered copies on laid Rives paper, 60 on pure rag paper, then the ordinary run of about 5,000 copies. On December 3, 1951, Gracq won the Goncourt and refused it. Reprints followed. The fine paper copies of the first print run remain significantly rarer than the ordinary ones.
Anne Lamort (La bibliophilie: tout ce que vous avez toujours voulu savoir sans jamais avoir osé le demander, SLAM, 2021) points out that the 19th century systematized large paper editions: as industrialization made books popular, publishers maintained an exceptional category on luxury papers, with an increase in bibliophile editions from the 1880s.
Destruction
Water, fire, use. Yves Devaux clearly states in L'Univers de la bibliophilie (Pygmalion, 1988): floods, fires, wars have destroyed millions of books. When the stock of copies of Une Saison en enfer was found in his Brussels printer's cellar, it was after more than twenty years in dampness and dust. And what about use, that silent gravedigger: some children's books, printed in thousands of copies, count only a handful a century later, and even fewer in good condition. Hetzel bindings of Jules Verne's works are a perfect example, still highly sought after but in much smaller quantities.
The nature of the paper does the rest: common print runs after 1830, produced on wood pulp, acidify and crumble, while fine papers last for centuries. See our article on antique books Mass distribution has produced its own rare books.
Febvre and Martin also document the role of censorship in the deliberate destruction of certain editions. Aragon's Le Musée Grévin (1943), published clandestinely under the pseudonym François La Colère, is one of the first literary evocations of Auschwitz. Censorship did the work of selection.
Autograph and Provenance
This touches on emotion. A meeting between the author, the book, and its first owner. This meeting can take several forms: the autograph inscription signed by the author addressed to its first owner, or the owner's mark, ex-libris or armorial binding.
Autograph inscriptions from author to author are the most sought after. When the author is Gérard de Nerval and he addresses his friend Théophile Gautier, the scope becomes historical.
This practice is not limited to romantics, as evidenced by the beautiful inscription Henri Michaux addressed in 1943 to a certain Marguerite Antelme, the married name of Marguerite Duras, then a civil servant in a small publishing commission under Vichy. Such autograph inscriptions transform a book from multiple to unique. See our copy of Exorcismes
A mention such as "Former André Breton collection" or "Pierre Bergé Library" gives a book a depth that no print run alone can create.
The KOEGUI bookstore's perspective: some authors are known for rarely dedicating books. Their inscriptions, even if seemingly common, remain rare and significantly increase the value of a work, even a common one. This is the case for those of Boris Vian.
Condition: what differentiates two copies of the same rare book
A loose binding, ink scribbles, a tired hinge, scuffed morocco, even a slightly faded spine: all these factors weigh on the value. At KOEGUI bookstore, our prices always take condition into account, carefully described according to the requirements of SLAM and LILA.
If the condition is good, then comes the question of the binding. Léon Gruel, in La Reliure et la dorure des livres (1896), establishes a hierarchy of materials that still structures valuations: cardboard, vellum, sheepskin, calf, shagreen, morocco. When they are signed by great binders such as Paul Bonet, Pierre Legrain, or Pierre-Lucien Martin, the value increases even further.
What makes the value of a rare book increase?
Like any commodity, a rare book is subject to trends. Even when major bibliographical catalogs, a Clouzot or a Vicaire, indicate "rare and highly sought after," only knowledge of the market allows for the most accurate appraisal.
The desirability of a title fluctuates in time and space according to cycles. A French bibliophile from the early 1920s like Jacques Doucet, advised by a certain André Breton, did not wish to acquire the same works as his predecessors. The 21st-century American bibliophile, whose demand for great French literature experienced a period of remarkable voracity, offers another example: this market evolves. What was no longer sought after can regain light thanks to a retrospective, a critical rediscovery, or a literary prize.
It is the bookseller's job to keep abreast of these movements.
The value of your book depends on this precise alignment of criteria. Have yours appraised
On the evolution of tastes in bibliophilia: see our article
What KOEGUI bookstore is looking for
By taste and conviction, KOEGUI bookstore very early on chose the rarest copies: special limited editions, signed bindings in near-new condition, autograph inscriptions. Each book is methodically inspected before integration into the collection: edition, justification of print run, condition, then the interior (inscription, drawing, annotation).
You can consult our selection of 19th and 20th-century French literature or contact us for any expert appraisal by appointment in Bayonne. Find us at the Paris Rare Book Fair and the ABAA New York Book Fair.
Frequently Asked Questions
Can a 20th-century book be a rare book?
Yes. Our copy of the original edition of Jean-Paul Sartre's La Nausée, one of 40 printed on Alfa paper, bound in full morocco by Pierre-Lucien Martin and enhanced with an autograph inscription by the author, is the exact illustration: 12,000 euros. This is precisely what we offer in our catalogs.
How do I know if my book is valuable?
Check the edition (is it the first?), the print run (is there a justification?), the condition (cover, interior, binding), the provenance (inscription, ex-libris). If in doubt: contact us.
What is a "grand papier" in a book?
A copy printed on superior quality paper (Hollande, Japon, Chine), printed in a restricted number, distinct from the ordinary print run. This is the top category: always rarer, often better preserved, systematically more sought after on the market.
Can a book in poor condition be rare?
Yes. Rarity depends on the number of existing copies; value depends on rarity combined with condition. A very rare copy in poor condition has value, but much less than an identical well-preserved copy.
What is a bibliophile?
An amateur who carefully seeks out and preserves rare or precious books. Our dedicated article details this definition.
Do you own a book whose value you would like to know? A member of SLAM and LILA, KOEGUI bookstore offers a free, no-obligation appraisal, remotely or by appointment in Bayonne. The appraisal is independent of any purchase commitment.
Sources
- Anne Lamort, La bibliophilie, SLAM, 2021 | www.slamlivrerare.org