The Courtship of Princess Leia is several storylines in one: Leia is engaged to Isolder so that she can get a home planet for Alderaan expatriates. Han wins a planet in a sabacc game. Luke is looking for information on the Jedi. All of this takes them to the Hapes Cluster and to Dathomir.Written by noted science-fiction/fantasy author Dave Wolverton, it was the first novel to feature the future X-Wing Series antagonist Warlord Zsinj, although he portrayed here as substantially different from what fans of that series may be used to.Tropes:
Artistic License - Biology - The origins of the Hapes Consortium - and how! The Hapans' ancestors were a large band of Space Pirates that pillaged nearby shipping lanes, taking the most beautiful females they found on the ships back to their bases, and over time, having only beautiful women giving birth led to the entire Hapan race being extremely beautiful. Put very simply, just because your parents are beautiful, there's no guarantee that you won't have a face for radio.
It was never stated that every child born was amazingly attractive. However, those who were not physically appealing didn't do well on Hapes. Survival of the fittest came into play. Family embarrassments were likely stashed away. Hence why Hapans seemed radiant.
The Dathomiri probably qualify as well. When you're a placental mammal who only has one or two offspring at a time, polyandry is less stable than polygyny.
Unless the male to female ratio is skewed towards males.
Fix Fic - The X-Wing Series does this for Zsinj and Melvar and the ambiguity of whether the Iron Fist is destroyed or not. It also contains plenty of straightforward continuity nods to Leia's mission to the Hapans.
It also, perhaps accidentally, leaves room for Zsinj to have survived. In Courtship, Zsinj is on his bridge talking with Solo over the comm when Solo launches torpedos into the Iron Fist's bridge windows. In the X-Wing Series, we find out that Zsinj liked to hang out in a complete duplicate of his main bridge with all control screens being echoed there so that he could watch over his subordinates shoulders without their knowledge. He also uses it as a stage for acting out his decadent leader persona for visitors without impairing the proper crew from running the ship. If Zsinj was in this bridge, he wasn't where the torpedoes hit and may have escaped. No such luck for Melvar though, who we see die on the planet surface.
Sci-Fi Writers Have No Sense of Scale - Han wins a Planet in a pot of cards worth 1.6 Billion Credits. Luke's speeder got 2,000 credits at a used car lot (for a maximum of 1 credit to $10 US equivalent). An inhabitable planet is worth $16 billion? Even for one under imperial interdiction, that means Bill Gates could purchase 3 planets! The estimated price of Earth is 10 QUADRILLION. This is also ignoring the fact that Han started the novel with an amount of money that is unspecified, but certainly no more than the cost of his Millenium Falcon, so assuming he leveraged that at a starting bid, he went from owning 100k-1M credits to nearly 2B credits. What luck to increase your net worth by 3-10 orders of magnitude in one night.
Possible subversion if it was done on purpose, for several reasons: 1) the Sabacc player is a strapped-for-cash noble-ish owner, 2) said owner most likely knows that the planet is not only in a sector under Zsinj's control but also inhabited by pesky (and more-powerful-than-they-look) natives, hence driving down the value of the planet - after all, what good is owning a planet if you can't come in and collect taxes or colonize it?, 3) this takes place in a "galaxy far, far away" wherein inhabitable planets aren't exactly scarce, and 4) this particular game of Sabacc is quite clearly pegged as being the equivalent of getting a Royal Flush at the high-rollers table of the MGM Grand. So all in all, it could go against the trope and be more realistic. Granted, Dathomir is described as particularly inhabitable, but it is also remote (location, location, location) and mostly unknown.
In the novel itself it's made clear that Han was royally screwed over, and he's chided for trusting a Drackmarian (the species of the player he won it from).
The Tooth Hurts: During Han's torture at the hands of a Dark Side witch, one of his teeth is telekinetically shattered. Actually the result of a successful bit of Briar Patching by Han. He specifically asked that she not do anything to his teeth, because he'd rather lose a tooth than something more immediately useful.
What the Hell, Hero? - The titular "courtship" refers to Han Solo shooting Leia with a brainwashing gun and kidnapping her. He's called on it at first, but the whole thing is all but forgotten by the end of the book, probably because it's so very creepy, and by that point they went through hell together. Chewbacca even offers to beat Han for Leia over it, life debt or not.