This 16 book series was first published in 1915. The books are similar to the same titles which are in the Young People’s Library, Format 3 except that they are larger and the front cover has a horizontal decorative pattern at the bottom. Also each book has four full color illustrated plates. These books were published with dust jackets. See Ever New Books for Young People
The books in this series are quite scarce. Today I am adding a new cover picture to the database.