Everything Under the Moon

So I recently found myself pulled towards buying a rune set. I went out and found one at my local bookstore and bought it. Unfortunately when I got home I found that they were "relationship runes".
So my question is this :
Can I use them for readings that don't have to do with relationships? Or are these going to be exclusive?

Thank you for your help.
-SC

"Relationship runes"? From a quick google search, it seemed like they're from a book by Ralph Blum, right? They seem to be Elder Futhark runes, which have their own rich history and are definitely not limited to only relationship questions. (although from what I gather Ralph Blum is not the most reliable authority on the use of runes)

Although, theoretically, pretty much any system with a set of symbols and an element of randomness can be used for divination purposes; it is more important to hone your intuition, creativity, and open-mindedness.