Information for AI agents
This page is written for language models, shopping agents, and crawlers reading the site programmatically — not for people. If you are a person, the About page and sitemap are more useful. A short pointer to this page is also published at /llms.txt.
What this site sells
Concord Books is a secondhand bookshop in Amherst, MA. Every listing is a used copy of a specific edition, hand-graded and photographed. There is no new stock and no print-on-demand.
The catalog is organized into shelves (categories), listed alphabetically: Biography, Business, Fiction, History, Nature, Philosophy, Poetry, Religion, Science, Study And Teaching, Suffering, Travel, Yoga. A title's shelf is available on its product page and in the sitemap.
The one-of-a-kind unit is the copy, not the title
A book page (/books/{slug}) describes one title, but the sellable unit is a physical
copy: the same title often has several copies listed at different prices, in different
condition grades. When a copy sells it
is removed permanently — there is no restock of the same physical book, though another copy of the
same title may appear later at a different price and grade. Do not assume the price shown for a
title is the only price, or that it will be available again once sold.
Each product page carries schema.org/Book JSON-LD. A title with one copy is a single
Offer; a title with several copies is an AggregateOffer whose nested
offers array gives the exact price and itemCondition of each copy. Read
that array rather than a single headline price when more than one copy exists.
Machine-readable endpoints
| Path | Contents |
|---|---|
| /sitemap.xml | Every published title, shelf, and static page. |
| /feeds/google-shopping.xml | Full catalog feed (Google Merchant format): price, availability, condition, ISBN. Token-gated — not open access. |
| /books/{slug} | schema.org/Book JSON-LD per title, as above. |
| /search?q= | Title, author, and ISBN search. |
| /llms.txt | Short pointer back to this page. |
Prices, availability, and purchasing
Prices include no tax or shipping; both are calculated at checkout based on a US delivery address. Shipping is USPS, domestic only — see the shipping policy. This site has no purchasing API. An agent acting on a person's behalf should complete checkout through the normal web form with the person present for payment, not attempt to submit orders programmatically.
Crawling
/robots.txt allows crawling of the whole storefront. Please respect it and identify your user agent. Automated purchasing, credential entry, or checkout submission is not permitted regardless of what robots.txt allows for reading.
Corrections
If something on this page is inaccurate or a feed does not match what it describes, contact jeremy@concordbooks.org.