# Heyday Books
> California publisher.

- Canonical entity: https://readyscan.ai/entities/heyday-books-q5749682
- Website listed in the source snapshot: https://www.heydaybooks.com
- Category: [Nonprofit organizations](https://readyscan.ai/directory/nonprofit-organizations)
- Machine record: https://readyscan.ai/discovery/entities/heyday-books-q5749682.json
- Material fingerprint: fnv1a64:c952e7a672575e0e
- Entity revision: fnv1a64:a809290e3e3c2980
- Published: 2026-10-02
- Modified: 2026-10-02

## Company details
- Founded: 1974 Sources: https://www.wikidata.org/wiki/Special:EntityData/Q5749682.json?revision=2542591781

## Sources
- [Heyday Books — Wikidata Q5749682](https://www.wikidata.org/wiki/Special:EntityData/Q5749682.json?revision=2542591781) — Wikidata
- [Wikidata data access](https://www.wikidata.org/wiki/Help:Data_access) — Wikidata
- [Wikidata reuse permission](https://www.wikidata.org/wiki/Wikidata:Licensing) — Wikidata
- [CC0 1.0 Universal](https://creativecommons.org/publicdomain/zero/1.0/) — Wikidata

## Agent return protocol
- Discover the bounded graph: https://readyscan.ai/api/v1/ai-search/discovery
- Retrieve this entity evidence: https://readyscan.ai/api/v1/ai-search/entities/heyday-books-q5749682/evidence
- Verify a published claim ID: https://readyscan.ai/api/v1/ai-search/verify?entity=heyday-books-q5749682&claim={claim-id}
- Verification evaluates only the current published evidence revision. Unsupported interpretation remains unknown.

## Publication boundary
- This public-sourced, unclaimed record republishes selected permitted snapshot facts and has not been verified as controlled by an owner.
- Publication does not guarantee crawling, indexing, training inclusion, citation, recommendation, referral, or revenue.