"The Days of Chivalry; Or, The Legend of Croquemitaine" by Quatrelles

is divided into three sections. The first section is about Charlemagne's jousts at Fronsack. Section two is all in dream-quests and visions both Charlemagne's and Marsillus of Saragosa as well as Charlemagne's nephew Roland's adventures in Spain. The third section is pure fiction and is about Charlemagne's godchild, little heroine Mitaine, and her errand to find and destroy Fortress of Fear where the Lord of Fear with his children dwell. This book famously inspired The Lord of The Rings, thanks to the fantastical quality of the story and its impact on the world.