# Heyday Books

> California publisher

**Wikidata**: [Q5749682](https://www.wikidata.org/wiki/Q5749682)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Heyday_Books)  
**Source**: https://4ort.xyz/entity/heyday-books


## References

1. [Source](https://projects.propublica.org/nonprofits/organizations/943268357)
2. archINFORM
3. Virtual International Authority File
4. [Source](https://web.archive.org/web/20250125074855/https://www.indiepubs.org/member-presses)
5. Google Knowledge Graph
6. [Source](https://www.indiepubs.org/member-presses)
7. [Nonprofit Explorer](https://projects.propublica.org/nonprofits/organizations/943268357)
8. Nonprofit Explorer
9. Aligned ISNI and Ringgold identifiers for institutions
10. [Source](https://www.archinform.net/service/wd_aiarch.php)