I second Sinisalo. She's one of our leading scifi/speculative fiction writers, and damn good at it. Not Before Sundown won the Finlandia prize (just about the most valued literature prize in Finland), and it was her first full-length novel to boot. The American English translation is titled Troll: A Love Story, IIRC. At this time I don't believe the rest of her writing has been translated, though she was editor for an English-language anthology of Finnish scifi/fantasy a few years back.