I have never read it, although it is certainly on my list.
Since we are playing the "Name that Book" game, I got one for you. I remember reading an old science fiction novel as a kid that was about humanity being wiped out by some alien species and scattered across the galaxy. They were pretty much treated as tolerated refugees on alien worlds since Earth had been turned into a nuclear wasteland. The only survivors had been a wing of military pilots from the scouting wing of the space navy and they had been all men. No women survived the attack and now the race of humanity was dying out.
Or so they thought. Some alien race wanted the men of humanity to help them wipe out the aliens that had destroyed Earth and promised them some human women in return for their help. It gets a little murky from here but apparently the women had been abducted years before or something. Anyways, they succeed, humanity is saved and they start rebuilding Earth.
Any one have any idea what the title might be? I know it was an older book (50s - 80s) but from that really is it.