Hello Shayan

Since I am studying International Law in the course of my LLB degree, I would like to recommend you some books that were in my opinion of credible value.

1) International Law by Malcolm N. Shaw - A concise book which is considered by most to be authority on international law

2) Textbook on International Law by Martin Dixon - A short but useful book

3) International Law by Antonio Cassese - A least orthodox book in style and approach but raises a lot of thereotical questions

4) Public International Law by A. Kaczorowska - The most legal book in style

Besides these there are many others but the above ones I found to be very helpful. Try to get the latest editions of all the books I have mentioned. Particularly in law, latest editions of books matters to a very high degree.

I hope this helps. Good Luck.

Take care

Awais