Q: Hi, we ran across this book (Rubaiyat of Omar Khayyam) in an old box. I’ve been trying to identify it/figure out its worth, but would like some help if possible.

A: Your book is part of the “Langhorne Series” and was published between 1914 and 1917. Originally its was sold within a fabled box.
For more info see: Langhorne Series 117
It is a reprint and, in my opinion, only has nominal value.