I have Visual Basic language knowledge. I started to use VB 4 years ago. I write programs for my business. I have little knowledge about C++. I know variable types, functions, loops, arrays, structures, pointers, io operations in C++ and I wrote some small programs with C++.

Now I want to develop games on ios. I have macbook pro. But I do not know where to start. And I do not have any knowladge about Objective C. So where should I start, which books should I read or ???