To make my question slightly different from others, I would like to know how would you rate on the complex analysis books by Ahlfors, Conway and Lang?
I had a basic course on complex analysis during undergraduate (and you could imagine it's mostly about computing integrals and residues), and would like to learn more about the theory. There exist many good books, and the three books aforementioned are the ones I like the most. Of course I don't and won't have time to study all these three books in detail, so I have to pick one.
The coverage of these books seem to be similar (except Conway's second volume, which should not be compared to others' single volume book). These three books contain rigorous proofs, so it's kind of hard to choose.
Of course if you have read any two of them or all three of them you are very welcome to compare these books. If you ask me where am I headed to I would say I want to learn something about several complex variables.
Also, if you think there is some book better than these three, you are welcome to mention it.