Svetlana Red and the Chevaliers - The Vampire's Little Black Book Series, #9

Will has never liked conflict. But the impassioned pleas of friends and the ascent of the horrors of World War II draw him into the fray between nations. He returns to Europe after spending almost forty years on American soil. Upon arriving in England, his homeland, Will rendezvous briefly with Anna before continuing on to France. Despite living hundreds of years and his vampirism, Will experiences violence beyond comprehension while trying to free friends from Nazi captivity.
Will he be able to help Frederic escape an occupied France? And who is the beautiful Russian vampire spy that has enticed Will? Is she truly a help or a hindrance to the Allied cause? And what are her real motives for romancing Will?