Reading Andre Norton's sci-fi books about the free-trader "Solar Queen" at the moment; Sargasso of Space, Plague ship and Voodoo Planet. Great stuff from the 1950's!
I have Saragasso of Space and quite enjoyed it. Never realized there were others! I'll have to hunt for Plague Ship and Voodoo Planet. Good stuff though, to be sure.
There are at least two recent "Solar Queen" books (recent = from the 1990s), written by Sherwood Smith in collaboration with Norton. If anything, they're better than the originals -- they feel a bit less 1950's, if you know what I mean.