This was, I think, Vance's penultimate piece of fiction, and is really only a complete work with Lurulu (which he pretty much admits in the introduction to Lurulu). It feels quite like a rewrite of Eyes of the Overworld and Cugel's Saga - a series of travel vignettes, loosely joined, only this time around the Cugel character not is a bit of a prick, but rather a young dreamer setting out on his long-sought quest amongst the stars. If you have read Vance before, the Cugel reference is probably all it will take to help you decide if you want to read this book: if you haven't read Tales of the Dying Earth, that or Lyonesse are more accessible starting points, so go read them first, and if you like those, you will like this.
With Vance, plot is always secondary to language, so there is not much point going through "what happens" in any detail. Suffice it to say this is Vance spinning a yarn and poking fun at how people behave. Myron Tany gets his dream of traveling the spaceways in a tramp trader, with his fellow crew members being largely eccentric, and the planets he visits being dangerous - one in particular being infested with human-pelt hunters, which gives us an unforgettable scene of love lost.
There is a wonderful ensemble cast here on show - crazed Aunts, gold-diggers, gambling pilgrims, mouse-riding tricksters...sit back and enjoy the ride.