Sure. 'Heir to the Empire' is a great one. It really expands the Star Wars universe post - the original trilogy.
Another good choice is 'Darth Bane: Path of Destruction'. It delves deep into the origin of the Sith and their ways. It gives you a lot of background on the Sith ideology and how it developed over time.
Well, 'Revenge of the Sith' novelization is also quite essential. It offers more details and inner thoughts of the characters compared to the movie. For example, you can get a better understanding of Anakin's fall to the dark side through the detailed descriptions in the novel.
Chapter 646, "This person deserves a slap in the face!", is the clearest early answer because it turns Don's situation into a concrete plot event. The chapter gives readers a real answer by opening on Jiang Yan: "....." Bloody green tea, get lost!
Chapter 718, "This Person Is No Longer the Same Person", is the clearest early answer because it turns Strong Arrays's situation into a concrete plot event. Early on, Changqing noticed her amazed gaze and his eyes also shifted to the....
Chapter 794, "Debut as a Group!", is the clearest early answer because it turns Jiang Yu's situation into a concrete plot event. It opens with Everyone crowded around Shi Xu as he entered the living room. and closes on After narrowly missing out in season one, he came back in season two....
Chapter 748, "Blacklisted", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Li certainly wouldn't pass up the opportunity of having a...
Chapter 20 is the strongest chapter-level answer because it starts from Several people turned their heads upon hearing the sound and saw three... and follows through on So, he turned and questioned Jiang Li..
Chapter 34 is the strongest chapter-level answer because it starts from Seeing that the public sentiment wasn't quite right, Su Yinwan felt... and follows through on Now that Lili is misunderstood, they start to kick us while we're down."....
Chapter 782, "Luck Swapped?", is the clearest early answer because it turns Luck Swapped's situation into a concrete plot event. The chapter turns that into something concrete by moving from Ah?????" "Sorry, I take back what I just said, this is beyond the... to Is this not our Sister Qing?.
Chapter 817, "Killed by Me", is the clearest early answer because the violence around Jiang Li becomes final instead of hypothetical.
Chapter 819, "Invitation", is the clearest early answer because it turns Jiang Bufan's situation into a concrete plot event. A useful checkpoint is the way the scene starts with What Yu Li said is something these prominent families often do.
Chapter 813, "She Has a Child?!", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event. It opens with In the past, he might have helped Meng WanZhi speak. and closes on Before long, a taxi stopped outside the door, and a round-faced girl....