I'm looking to learn C++, (with a specific software project in mind, so sort of on-the-job training, which has always worked really well for me in the past.)

The thing is, I don't want to be tied in to Windows (or Visual Studio). And although I have a copy of Visual Studio, I'm actually happy writing code in a text editor (as I have for web development) and using a compiler like N/Ant. My biggest reason for not wanting to be tied in to MS/VS is that I want to write apps not just for Windows but also for Linux and Mac(/iPhone). I understand there will be some work in porting from one OS to another (and before someone suggests it, I'm really not interested in Java.)

I've looked for C++ books in Barnes & Noble, etc. and they all seem to fall into one of two categories:
1. C++ fundamentals - but nothing about GUI programming
2. Completely Visual Studio/Windows-centric

I'm sure I could cover all the bases with multiple books, but with the price of technical books, I just can't afford it.

So, can anyone recommend a (single) book that might meet my needs?

Thanks for taking the time to read this.