Stalwart sf fans will most likely find Dozois' twentieth stout annual anthology as satisfying as any of its predecessors. The authors represented in it range from multiple-award winners Gregory Benford, Nancy Kress, and John Kessel to skilled newcomers Molly Gloss and Chris Beckett. In-betweeners in terms of prize winning and output include Ian MacLeod, Ian McDonald, Bruce Sterling, and Eleanor Arnason, who should write much more. Dozois has again cast his net widely, drawing Geoff Ryman's entry from a chapbook and Walter Jon Williams' from the electronic media. As usual, sf magazines are leading resources, with Asimov's and Fantasy and Science Fiction leading the pack in total contributions and Inter zone coming in third. Selections from original anthologies are fewer this year, though. As long as the short story remains an important form for sf, Dozois' anthologies will be required reading for the genre's fans.