Found a good (but brief) article that summarizes differences/similarities between the book version and the show version. Might be a good read whether you are a reader, watcher, or both.
https://www.vox.com/culture/2017/8/28/16216920/winds-of-winter-release-date-news-chapters
I do think there is one error in the article. I'm pretty sure Dany was not accompanied by Drogon when she ran into a huge group of Dothraki, so it is realistic to assume that she is taken prisoner, like she was in the show. The way I remember it, she left him behind in his den/lair and went looking for her way back to Mereen. She had walked a long way before encountering the Dothraki.
https://www.vox.com/culture/2017/8/28/16216920/winds-of-winter-release-date-news-chapters
I do think there is one error in the article. I'm pretty sure Dany was not accompanied by Drogon when she ran into a huge group of Dothraki, so it is realistic to assume that she is taken prisoner, like she was in the show. The way I remember it, she left him behind in his den/lair and went looking for her way back to Mereen. She had walked a long way before encountering the Dothraki.