Good, evening all. My knowledge of EU material outside of the saga and anthology films are basically 0.What are some good books to get introduced to that universe?
Kinda depends on what you are seeking in the EU: If you want to go into the later parts of Ledgends especially those where they leave the empire vs. rebels dynamic behind I would defenetly recommend starting with YJK, defenetly improves NJO by a lot. Heir to the Empire and the other TTT books are generally more of the same as the OT, its Luke, Han, Leia, Chewie and Lando fighting the empire, yes there are some new characters and worldbuiling but the core story is very OT esque I would say.
Heir to the Empire, X-wing books, I, Jedi, Hand of Thrawn Trilogy. That will give you a solid footing.
I echo previous recommendations of Heir to the Empire. It launched my interest in reading Star Wars seven years ago. Dozens of books later, I still think of it as one of the best.
All of the above are epic (there are a few in the NJO that are not so much) but SW is SW........and I love it all. Especially the X Wing Series...... I, Jedi was brilliant too.
If you are interested in the prequel trilogy time period, the novels written by James Luceno provide a lot of background. The Essential Guide series also offers a lot of information...
If you're interested in how the EU differs from Canon (the new films starting with TFA), I'd suggest starting with the Thrawn Trilogy or New Jedi Order. Thrawn Trilogy takes place around 5-10 years after RotJ and was what launched the EU back in the 90s (it was basically Ep. VII, VIII, and IX back then), and introduces some major EU characters for that era. NJO takes place within a similar timeframe as TFA and TLJ, roughly 30 years after RotJ. I started with NJO, but most people will tell you to start with the Thrawn Trilogy.
I'm going to pile on and also say the Thrawn trilogy (Heir to the Empire, Dark Force Rising, The Last Command) is the best place to start. It was pretty much the start of the modern EU, and it's still pretty close to the original movies (five years after ROTJ), so you don't need to know much backstory when you go in. And it introduces several characters that're as important to (that version of) the Star Wars universe as the ones from the movies.
In addition to what the others recommended, I'd suggest the anthologies. Like Tales from Jabba's Place or Tales from the Mos Eisley Cantina. There are a bunch of short stories, some better than the others, but they're awesome for world/character building.