Here are all 4 volumes of the CONTINUUM anthology series, edited in 1974 by Roger Elwood and featuring original stories by a lineup of stars from the day: Philip Jose Farmer, Poul Anderson, Anne McCaffrey, Dean Koontz, etc. etc. etc. Great series.
#1 - near mint condition, looks almost unread. One page corner was folded down.
#2 - minor shelf wear
#3 - Light crease to spine, minor shelf wear, , else VG
#4 - crease to spine, minor shelf wear, else VG