CIMA Books

Hi everyone,
I’m considering to take CIMA exams next year. Due to the fact that I’m not native English speaker I don’t know if my English skills’d be sufficient to pass it. I’m watching opentution videos and find it not so difficult to understand (I graduated finance and accounting).When it comes to solving examples provided by opentution I find it relatively easy. But there’s one thing that troubles me – study case, which by its nature requires to have a very good English skills. I’d like purchase all books for operational level this year in order to practice my language but the question is: should I expect that content of this books will change since the next year? I’d like to avoid wasting my money…
Any help appreciated!