Deeper explorations of international law

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I have to come up with a plan and the first chapter for my thesis on peremptory norms (jus cogens) in international law and I am  considering participating in a competition that touches upon State immunity, diplomatic immunity of Heads of States and probably the right to self-defense. 
Consequently, I had to immerse myself very deeply in details of international law and there are some very interesting facets.

It seems that one has to be quite the magician to traverse this field where one and the same court case can be used in arguments both pro and contra and where practice doesn't seem to follow theory, yet we are assured that practice is at fault. I believe this is one of the reasons why there is so much academic activity surrounding it, thought it is not totally without interest to non-experts.

In my explorations I have stumbled upon two very interesting blogs that reflect on  current issues (such as the current Falklands dispute, the US drone attacks or the alleged Mossad hit in Dubai) and their implications in international law. Both the blog of the European Journal of International Law, EJIL: Talk! and Opinio Juris  write in an accessible language and present interesting arguments from leading scholars in the field.