Okay, first of all thanks a lot for asking me!
And second
Hamid khan's constitutional and political history of Pakistan covers constitutional law very well. Except the constitution parts of course.
Political science is a bit tricky though,
Political thought from Plato to present by Judd Harmon
Or
Western political thought by Dr.Sultan khan
Muslim political thought by Dr. sultan khan
Or
M.M.Sharif's A history of Muslim philosophy.
Mazhar ul Haq's book political science: theory and practice
For part 2
World constitution by S.L.Kaeley
Or
Constitutions of the World by Dr.Sultan.
I have all of these book, Dr.Sultan's books are not generally liked or preferred.
But, I like them anyways..
I hope that helps, If you have any more questions feel free to ask.
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