Oh, even better: each of the first four books has a pro-environment moral shoehorned right in. The first book, The Glove of Darth Vader, is "save the whales", The Lost City of the Jedi is "save the rainforest", Zorba the Hutt's Revenge is "smog and air pollution are bad mmkay", and Mission From Mount Yoda is "ground and water pollution are WORSE".
While you're at it, meet Grand Moff Hissa, a near-human Grand Moff. His ears are natural, but he deliberately filed his teeth down to points to look scary.
Also, the usurper Trioculus spends every book getting the shit kicked out of him, usually by the very stuff he does. First, he wears the Glove of Darth Vader, and it does nothing for him because he can't use the Force, so he has little devices installed in it that will let him sonic-attack whoever he wants with a lethal frequency only the target can hear, so they LOOK like they're being choked to death when they're actually being killed with the AWESOME POWER OF ROCK.
Using these devices makes him blind in the second book, because reasons. He runs into a hut on Yavin IV in the middle of a forest his men are burning down to get the only thing that will cure his blindness, and ends up heavily scarred as a result.
In the third book, he gets frozen in carbonite by Zorba the Hutt, because he's just that much of a fuckup.
In the fourth book, his carbonite block is disintegrated by the Prophets of the Dark Side in a coup. Except haha, just kidding, that block was fake, Zorba snuck the real one out, and the Moffs get hold of it instead in the fifth book, then thaw Trioculus out.
In the fifth book, Trioculus captures Leia to be his bride. She is rescued and swapped out for a human replica droid who shoots him through the heart with eye lasers, and at the very start of the sixth book he dies of his wounds.
So Trioculus is kind of the writers' chew toy.