Steven Zimmerman they do go together but you won't notice you're missing something if you havent read the others.
Beverly You do not need to read The Broken Empire Series. I could not read it. It was too dark for me. However, I read and very much enjoyed Prince of Fools. It is a completely different story and characters even though it is in the same world. The "almost" meeting of Jalan and Jorge was noted and not unappreciated.
Leialand Sure, I guess. You'd miss out on a crossover tidbit and maybe some worldbuilding, but the narrative in Prince of Fools should be enough to tide you through the main plot.