CLUMP: Many of the details that today’s fans take for granted were supplied by West End, which Slavicsek said produced about 1.5 million words’ worth of Star Wars lore in his roughly five years on the project. “I had to convince [Lucasfilm] that ‘Hammerhead,’ for example, was not a name for a species. That was an insult,” Slavicsek said. “So they let me create the name Ithorian, and Twi’lek, and Rodian, and on and on. Those are the kinds of things that you had to put in to build a world so that people could play in it. … We basically laid the foundation for what the world felt like, beyond just the names and the technology that we were naming. We were giving a structure to the place.”