Pretty similar in a few areas to UK CAA air law.
Unfortunately it is not law from this decade in fact from this century! It is mostly based on 1960s UK Air Law.
As for studying for it agree with above comments but best source is other pilots from your firm/airline.
It would be nice if there was some applicability of the exams to actual flying in Nigeria but unfortunately the NCAA don't really do anything other than for show so it is basically best to treat is as yet again another expat hurdle.
Learn the answers you are given by colleagues pass the exam and then invest your time and effort in staying alive which is the majority of the challenge with some the infrastructure and professionalism of many of the airspace users and operators in Nigeria.
Getting the licence on the other hand depends on who you know as Nigerians do not really care if everything is correct. It is more a continuous need for them to demonstrate their ability to exercise some power over you situation. So lots of form as opposed to substance and be suitably humbled and all will be well.
VT
