Neurolex is good for lists of connectivity.
You'll probably want to read some studies eventually, since they are widely accessible.
Nature articles are usually well written, which is important if you can't interpret the results to resolve ambiguous writing.
I think many things are debated/inconsistent. Different studies find different results sometimes, and using anaesthesia, slices, young animals, etc. can have a big impact. Even books can disagree. There are lots of things which almost everyone agrees on, though.