The Youngest Pevensie Sibling series- book 1- The Faithful

This is the first book of The youngest Pevensie sibling Series
Part 1
Sophie was just a young girl of 10 treated like a baby. when she and her older siblings were sent off to the countryside to stay with professor Kirke. They were escaping the terror of the war which was devastating London. The professors house is filled with mysteries, adventures and an intriguing wardrobe.
When exploring the house Sophie and her sister Lucy open the wardrobe doors into a new snowy world. This world is not at peace and it falls down to the five siblings to bring peace back
Part2
Now as Queens and Kings the siblings think that they can relax. But ruling comes with many responsibilities. When an evil emerges that threatens the siblings and the kingdom of Narnia relationships are put to the ultimate test. There is now a race against time to save one of their own and mend relationships before it is too late.