I am not a native English speaker, however, due to my career choice I have to stay in an English speaking country (there isn't happening as much in others or my home country). This means I will have to learn to write in English, because my career depends on writing and speaking. And I also want to restart writing fiction, just for myself and maybe some online literature lovers. Please recommend me some good books or online sources about English grammar, interpunction etc. Something that English people use in high schools or college. If you have a degree in English or Creative Writing - what books did you use? I want to master this language. Every day I read fiction and scientific texts but it's difficult to get much out of just that.