Q: Here are two pictures of my book maybe you can tell me about it and let me know if it’s worth anything. The Greatest Thing in the World

A: Your book is from the seven book Trevose Series (http://henryaltemus.com/series/series176.htm) and was published between 1915 and 1933.
It originally came within a labeled box.

It is a reprint and only has nominal value.