The Mammoth Cave of Kentucky

I found this in my local antique mall in Port Townsend, WA. I thought it was really cool to find a book about Mammoth Cave (I'm originally from Western KY) in Washington. It's in pretty nice hard back condtion. The covering is green cloth with gold lettering for the title. I'm pretty sure it is not a first edition, but I like it all the same. I just wish I knew more about it. Any comments about its value would be welcome, as I am completely ignorant of the value of old books.