OKAY I'M HERE you're talking about the novel of PASSION right? I couldn't find it in the app but try looking in Anna's archive. It's a website where you can download books/novels and read wherever you wanna open it (i personally read it in OneDrive but i think you can in PDF too). Also the app's mechanism isn't that hard, the search option is first thing all the way up. But if it's not to your liking, there are a toooon of apps in the app store that you could try. They have a lot of free ones. I hope you get to read your novel

Sooo different than the novel...the art style changing isn't a problem, but Taekjoo was much more struggling and trying to break free in the novel comparing to this...