A Single Snowflake

A Fantasy novel with a difference, there are no long journeys or quests to find an amulet or other such treasure, no magicians or wizards; but strange things do happen.
Everyone on Earth has a Guardian, but not everyone can recognize them, but others have known them all their lives.
Two children who are bought together by a twist of fate are so important to the existence of Shenka that two of Shenka's own are sent to protect them.
A snowflake falling in the summer, followed by the scream of a woman and a cry of a baby, fractures the border between Shenka and Earth, the race is now on to find the source.