Yes, some of the cast members of 'The Untamed' did read the novel. Reading the novel helped them better understand the characters they were going to portray, the complex relationships in the story, and the overall world - building of the story. It allowed them to bring more authenticity to their performances.
You could check out your local library's digital collection. Many libraries offer online access to various novels. Another option is to search on specialized fiction reading apps. Just make sure they are legitimate sources.
Some of them surely did. Since the novel provides a more in - depth look at the plot and characters compared to the script, it was beneficial for those who read it. It allowed them to add extra layers to their characters, like small mannerisms or emotional nuances that might not have been specified in the script.
Check your local library. They may have a physical copy or an e - book version that you can borrow. If they don't have it directly, they might be able to get it through inter - library loan.