Here you go
https://www.novelupdates.com/series/lucia/?pg=18
This might be subjective, but I believe the novel is much way better than the manhwa. And I think most people who have read the novel would've think so too. Also, here's a different link in case you're no accustomed to reading on novelupdates:
https://rubymaybetranslations.com/table-of-contents/ (and in case you were wondering, ch49 of this manhwa is based on ch21 of the novel)
Chapter 50 in the manhwa is chp 21 in the novel. You can use this link
https://rubymaybetranslations.com/2018/04/19/lucia-chapter-21/
I know the novel has more chapters and the webtoon is ongoing but I just want a good quality experience from reading the novel, but if the novel is the same as the webtoon then I don't mind reading the webtoon instead.
Also If you have the link to the novel don't be shy comment it!