This accordion advertising flyer has eight panels per side making it the largest of its type that I have seen. It is from 1912. It noted a number of 1912 books but no 1913 publications.

The first two titles in the Range and Grange as well as the Boys of Steel series are listed. They are all 1912 volumes. The third and fourth books in these series are not mentioned. The first two books in the Young Engineers Series are advertised but the 1913 third title in the series is not.

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