It's ongoing. Chapter 47 ≈ Chapter 70 (novel) https://wooksteahouse.com/variant/the-guild-member-next-door/chapter-70/
It's a pretty good adaptation in my opinion! It's simply the typical "can't fit every little detail in". Though I was a little disappointed in the last scenes. YW and Jigu's family actually met at the parking lot of their building, and most of the introductions were done in the car on the way to the restaurant. There was also more bonding done between the brothers and YW, and the whole "Jigu escaped to the military" bit was explained better in the novel. I'd recommend the novel for the full experience and more of Yeonwoo's thoughts, but the differences are not drastic :)
Lowkey regret reading the novel because now I'm not as excited about the manhwa as I used to be ╥﹏╥ Instead now I'm nitpicky about what made the cut and what didn't lol. But the story is just so good I couldn't help myself...