SF Masterworks

SF Masterworks is a series of science fiction books started by Millennium and currently published by Gollancz (both being imprints of the UK based Orion Publishing Group).

It began in 1999 and comprises selected pieces of science-fiction literature from 1950 onwards (with a few exceptions). The list was compiled by the managing director of Orion Books, Malcolm Edwards, with the help of "leading SF writers and editors" and the goal of bringing important books back into print. The list was described by science fiction author Iain M. Banks as "amazing" and "genuinely the best novels from sixty years of SF".

It has a companion series in the Fantasy Masterworks line. A separate Future Classics line has also started featuring eight science fiction novels from the last few decades.

Gollancz officially relaunched the series in March 2010 beginning with reissues of the first ten titles. These titles have new cover designs (no longer featuring numbers) and introductions, and other existing titles are planned to be reprinted. Gollancz also added new titles to the series beginning in April 2010.