PLEASE help me in finding good books

[Muhammad Umair Malik]

Asalam-u-alikum,
Dear members please guide me in finding good books for CSS.
There are number of books in the market and that creates lots of confusion.
FPSC recommends too many book for a single subject, they often suggest 30 to 40 books for each subject. 1st of all it is impossible to get all the recommended books. Secondly, no one can study 30 books for one subject (PRACTICALLY). Thirdly, if we had to choose few books from those recommended books then we are not sure about the best book among them and which book contain complete syllabus.
its been one week i am searching books but still standing at point zero undecided. I cannot join any academy due to my job hours.
Please Please Please help me and suggest me books for css 2020, maximum 2,3 books for each subject.
My optional subjects are as follows:

1)Accountancy and Auditing 200
2)Public Administration 100
3)Gender Studies 100
4)US history 100
5)Criminology 100