What to do after iOS?

Hey everyone!

The short version:

What do you recommend to study/read/learn after the iOS book?

Long version:
I’m a university student in London, studying Politics and I (study) programming as a hobby.
I finished the objective-c book and I’m more then half way through the iOS book.
I’m trying to learn programming languages which are useful (possible plan b, could make money with it, widely used etc…).

Do you guys have any recommendation on what to do next?
I was thinking about Android or maybe PHP,Ruby or similar.

Thanks!

Hi frenkeld,
Since you are learning programming as a part of hobby I would suggest you to take up android development and read books on android. Android is really an interesting platform and easier to learn as well. The demand for android app developers is also growing in the market!