Unexpected Visitor

An Icewing named Mammoth is top of his ranks, and will soon be a king beside Queen Glaicer. But, he meets a Nightwing that just happens to be the Queen of the Nightwings, and instead of killing her for the war between the two tribes, he ends up falling in love with her. Follow his journey to see what he decides to do, or is his destiny already written?
Based off books by Tui T. Sutherland