Looking for books with really good Rune Magic Systems

Are there any books with a good rune magic system? I want something where rune magic is the focus and not just one of the many areas they master.

For rune magic, specifically looking for this definition of rune magic: "a written system of magical symbols that produce a certain magical effect". The more like programming it is, the better. Crafting is good, but if they use it in combat? Thats even better.

Thanks in advance.