[Prince of the Night]

I am new to fantasy, but have the general rules down, as I have played 40K for over ten years.

I am thinking about building Dwarves, and as I read the army book I thought I had it pretty well figured out until I read the example 2000 point army list in the back of the book.

There is an organ gun, a cannon, a grudge thrower, and a master engineer.

How does the cannon get rune of reloading, and the grudge thrower rune of burning?

I found nothing in the army book that would allow my artillery to take runes.

Help please.