what course books do you suggest?

[kattaoki]

Hi:)
I'm a new teacher and I'll be teaching few classes next week. I'd like to ask some more experienced teachers to help me with choosing course books for my students.
there are three different groups:
- FCE
- Business English (level B2 - so it's similar to fce but for business classes)
- 2 people aged around 40 who are false beginners

I'd also like to know why you suggest the books. Like I wrote before I'm quite new to the game so I'd like to understand it all better.

My suggestions:
FCE - First Certificate Expert" or "FC Masterclass"?
Business - Market Leader, Intelligent Business or Business Benchmark? but why, I don't know, Haven't taught Business English before:(
2 people - Basic Survival, I think there's a lot of practical stuff, but I don't know what else

A little help, please?:))