I think this may be the only "Binary Star" from Dell that I own, but I'm quite sure others are out there (turns out there were only five). Destiny Times Three was a fine work in its day (1943). Spinrad's novella (Riding the Torch) was from a much later era (1974), and it shows, both in characterization and in plot.

It's a poor execution, and I note that even the ISFDB doesn't issue credit to this particular publication. I don't find it on either author's list, although I see an entry on Spinrad for the Afterword for "Destiny Times Three". It's the right date. Odd. (Both authors wrote an afterword for both stories, discussing both of them.)

http://www.isfdb.org/cgi-bin/title.cgi?125358 (Spinrad's afterword)

Maybe I'll get around to updating the ISFDB entry some day. ( )