Mark Sul­li­van is the acclaimed author of eigh­teen nov­els, includ­ing Beneath a Scar­let Sky, which has sold mil­lions of copies to date. His lat­est nov­el, The Last Green Val­ley, is also based on a true sto­ry of the Mar­tel Fam­i­ly and their track across east­ern Europe dur­ing WWII. A for­mer instiga­tive jour­nal­ist and avid ski­er and adven­tur­er, he lives with his wife in Boze­man, Montana.