C. Alexander London is the author of Mission Hindenburg, book two of Doublecross. He is an Ekaterina.
He wrote a POV for the 'Steal Mission Hindenburg!' thread. It can be found here: http://doublecross.scholastic.com/forums/topics/138585?page=7#post_1999395
He is also the author of Outbreak, the first book of Superspecial that released on 27th September 2016.