Monthly Market Index · May 2026

The Rare Book & Fine Art Index

This monthly index aggregates verified auction realizations across rare books, original prints, vintage photography, autographs and fine art. Every figure is traced to a public sale record; no synthetic data, no asking prices, no broker estimates.

Download the report PDF for free

Enter your email. We send the May 2026 PDF immediately (10 pages, ~70 KB).

What is inside the report

Ten A4 pages of verified data, original charts and insider notes. Zero AI hallucination — every figure is traceable to a public sale record.

13 category statistics

Median, average, maximum and 2019–2024 yearly trend for every auction category with at least 1,000 verified lots.

Category mix

Donut chart of lot distribution by category. Instantly see where the market is moving.

Top 5 all-time records

The five highest realizations across categories, with price, year and category.

Insider notes

Three red-flags per category: common fakes, hidden restorations, provenance gaps. Sourced from the BookOracle corpus.

Transparent methodology

EUR-normalized hammer+premium, public sources, statistical rigour. No asking prices, no brokerage estimates.

Verification QR

Every PDF has a cover QR — scan it to verify the document authenticity online, anytime.

Frequently asked questions

Where does the data come from?

Exclusively from public auction archives of international houses (Christie's, Sotheby's, Phillips, Swann, PIASA, Bonhams and 200+ others). Every record is verified and includes hammer price + buyer premium in EUR.

How much does the report cost?

The PDF is completely free. We only ask for your email to send it and to notify you when next month's issue ships. You can unsubscribe anytime.

Can I use the data in my thesis or article?

Yes, with attribution to BookOracle. For commercial use (resale, mass redistribution, white-labeling) contact us for a license.

How often is a new report released?

Once a month, on the 1st at 06:00 UTC. Subscribers receive the PDF by email the same day.

Need more?

The Pro Plus plan includes unlimited valuations, custom reports for your collection, API access and priority support.

EUR 150 / month
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All figures in this report are statistical aggregations of verified public auction realizations. Past sales do not guarantee future prices. BookOracle is not a licensed appraiser; this report is intended for informational and editorial use only. © BookOracle 2026.