A blend of semi-hard, semi-sweet science fiction with historical fiction, Eifelheim comes across as intelligent yet smug. Michael Flynn concocts a "perfect storm" of coincidences, particularly for the two present-day main characters, to carry his narrative. While every story will rely on coincidence in some fashion or another, Eifelheim's plot resembles a meticulously constructed house of cards built in the windiest location on Earth (a quick Google search turns up no consensus on this…