The Year's Best Science Fiction was a series of science fiction anthologies edited by American Gardner Dozois until his death in 2018. The series, which is unrelated to the similarly titled and themed Year's Best SF, was published by St. Martin's Griffin. The collections were produced annually for 35 years starting in 1984. In the UK, the series was titled The Mammoth Book Of Best New Science Fiction and published by Robinson. The Fourth Annual Collection in the US, in 1987, became the first book of the "Mammoth series" in the UK. For the next five years, from 1988 through 1993, the UK series was titled Best New SF (#2 through #7). Source: Wikipedia (en)