not before sundown (orig. fin. "ennen päivänlaskua ei voi", united states: "troll - a love story") is a novel by finnish writer johanna sinisalo in 2000. in the same year it won a finlandia prize for literature. since then it has won several awards including the james tiptree jr. award in 2004 for works of science fiction or fantasy that expand or explore our understanding of gender.