Easily confused with many other 'Best of the Year' anthologies. This series first published bu Dutton consists of 5 books by Del Rey (for the years 1971 to 1975) and 5 by Dozois for the next five years. If your book is here please move to the correct year. These are canonically named " Best Science Fiction Stories of the Year First (or second, third etc) Annual Collection"

This series from publisher E.P. Dutton would run to ten annual volumes; #1-5 were edited by Lester del Rey, #6-10 were edited by Gardner Dozois. These last five volumes of the Dutton "Best Science Fiction Stories of the Year" series should not be confused with the similarly-named "The Year's Best Science Fiction" annual series that Dozois would later edit for Bluejay/St.Martin's. They are distinct works, with distinct contents.