Today's free book is The Forge in the Forest by Padraic Colum (1925), with illustrations by Boris Artzybasheff. For the table of contents, check at the bottom of this post below the image.
The book is available at Hathi (I have not checked for other online sources).
Table of Contents
THE BEGINNING :
The Forge in the Forest
Phaethon
Old King Fork-Beard and the Scarf That He Gave
The Story of Ys
King Fergus and the Water-Horse
The Seven Sleepers
King Solomon and the Servitor of the Lord of Earth
Saint Martin and the Honest Man
Bellerophon
THE END :
The Horse