# Ragnarok: The Age of Fire and Gravel

> book by Ignatius Donnelly

**Wikidata**: [Q7283176](https://www.wikidata.org/wiki/Q7283176)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Ragnarok:_The_Age_of_Fire_and_Gravel)  
**Source**: https://4ort.xyz/entity/ragnarok-the-age-of-fire-and-gravel