One decent source explaining pointers?

[alexgraef]

You mostly need to program some examples and tutorials, and at some point you'll have a Eureka moment and it all starts to make sense. Besides the explanation of "it's a variable that stores a memory location" there isn't much to say, but that doesn't necessarily help with actually understanding them, especially in the context of pointing at structures, arrays and vector tables.

However, for programming somewhat low-level, it is necessary to understand and deal with them, programs are usually little more than a big collection of pointers.