Destruction & Deliverance - The Flames of Wrath.
This is the story of Zet the demon of wrath and his nemesis and mate Sahara who is the angel of patience. They are both human and are brought together to search for one of their own who they think have been kidnapped. In their quest to find their own sibling they find that the other one's sibling has faced the same fate as theirs. The problem is they don't know what that fate is and they race against time to find out.