You could start with 'The Horus Heresy' series. It's a major part of the 40k lore and sets the stage for a lot of the events in the universe. It's quite epic and immersive.
For a beginner, 'Gaunt's Ghosts' is a good choice. It has an engaging story and helps you get familiar with the complex world of 40k. The characters are well-developed and the plot is exciting.
The best chapter pointer here is Chapter 69, "Received Two Advertisements on the First Day". It opens with Since the phones issued by the program team couldn't log into Weibo, Wen... and closes on Wen Jiaojiao immediately hugged her arms proudly, specifically waiting to....
Look to Chapter 62 for the clearest answer. It begins with Sitting on the edge of her bed, she pondered for a while before lifting..., keeps building through The moment the door opened, she saw her photographer with his hand still..., and lands on Jiang Li reached in, pulled out a piece of paper.
The best chapter pointer here is Chapter 68, "She finally managed to win a round back!". It opens with Jiang Li carried the noodles straight out of the kitchen and came to the... and closes on But didn't Uncle Zhao say he was still sick?.
If you want the clearest chapter reference, go to Chapter 77. Early on, Wen Jiaojiao's reminder calmed Shu Yan down.; later, the chapter leans on Indeed, the wild mushrooms on the Southwest Plateau were complex in....
Look to Chapter 39 for the clearest answer. It begins with Qi Tianyu had been looking forward to watching Jiang Li's drama unfold., keeps building through But to his surprise, Wen Jiaojiao, who seemed to possess some strength,..., and lands on His original intention was just to make Jiang Li back.
The best chapter pointer here is Chapter 55, "I Can Prove Everything Miss Jiang Said Is True!". It opens with Su Yinwan hadn't expected that, in just one day, Jiang Li's reputation had... and closes on He Yun's fans were immediately displeased..
If you want the clearest chapter reference, go to Chapter 74. Early on, Having seen Jiang Li's ID before, he knew that this person named Shiguang...; later, the chapter leans on And he only knew the answer to that one question..
A practical answer is Chapter 24, because it turns the idea into a concrete scene. The chapter opens with Not only that, even the non-mainstream photos she had previously posted on..., adds pressure through Just because of his arrival, both were severely affected by public..., and ends on Shi Xu.
Chapter 65 is the strongest chapter-level answer because it starts from Several minutes later, the room remained silent. and follows through on What's the deal with these two?.
Look to Chapter 81 for the clearest answer. It begins with Qi Tianyu, who chose curry beef rice, received a piece of curry and a..., keeps building through Shu Yan was relatively lucky, she got a bundle of noodles and a bag of..., and lands on The summer on the Southwest Plateau is no joke;