The Young People’s Library was an Altemus juvenile fiction series which was published between 1895 and 1933. During this time frame there were four consecutive formats which are easily distinguished by their spine designs. Samples of Format 4 spines are shown below.

Today I am adding a new cover to the Format 4 books (http://henryaltemus.com/series/series202F4.htm). There are 37 titles in this format. They were published between 1923 and 1933.

Dating these books definitively is difficult because the ads in the back of the book were randomly placed. The dust jackets usually match the appliqué cover picture. Occasionally however the jacket matches a frontispiece picture which is not the same as the cover.