If you can magnify this preface, you might read a statement of the aims of the compilers for the youngsters who were exposed to this. I'll assist you a bit. The penultimate paragraph says,
"As the best literature makes a distinct moral appeal to the reader, it is evident that the subtle influence of such selections as this book contains will help boys and girls to live more happily and helpfully." (Double click on the image to enlarge.)
As there are nearly 400 pages in the book and since there are about 100 authors represented, it would be too tedious to list the contents, but a suggestion thereof might be made by listing just a few of the authors represented. Some of them are Robert Browning; Edward Everett Hale; William Cullen Bryant; Helen Hunt Jackson; Henry David Thoreau; John Milton; John Bunyan; Henry Wadsworth Longfellow; Louisa May Alcott; James Whitcomb Riley; Robert Burns; James Fenimore Cooper; Samuel Taylor Coleridge; Benjamin Harrison. I think you may get the idea.
I offer here no moralizing, no judgments; but I do ask that you reflect on this a bit. You might look at your kids' current reading materials as you do so.