Alister E. McGrath 
Darkness Shall Fall [EPUB ebook] 

As the volcano’s dark and deadly cloud draws closer, Peter, Julia, and Louisa fight to protect the people of Aedyn, attempting to shelter themselves from the strengthening dark forces. As their enemy closes in, a stranger arrives, claiming to come from the Lord of Hosts to help in their escape to Aedyn and safety. But Louisa doesn’t trust this stranger, and her mistrust leads to further conflict. Can Peter, Julia, and Louisa overcome their disagreements in time to lead the people in the fight for freedom and truth, even when all seems lost?