Q: I read your information on the Internet about these books and am sending you these pictures to see if you can tell me their approximate value. All three books have the blue endpapers. The Foolish Fox, Mother Goose Nursery Tales, The Robber Kitten

A: This series of little (5.5′ x 4.5″) books was published in three formats. The third format (pictured here) which has an appliqué picture placed on a stereotypical line drawn illustrated cover had 37 titles. The dust jackets matched the front covers.

The endpapers can be used to date the book. Blue endpapers were found in volumes published between 1923 and 1926. See sample picture below.

This format was published between 1917 and 1931. http://www.henryaltemus.com/series/series186.htm
The series first two formats were published between 1904-1917. http://henryaltemus.com/series/series185.htm

The value of the books is dictated by the particular title, condition, presence of a dust jacket, etc. These three titles are not especially collectible and thus have limited value.

A couple of sample dust jackets are seen here.