To achieve perfection HSC BOARD EXAMS these are the top scorer books :-

Physics :-
Government Sanctioned Text Book (G.T.B)
Navneet Publications - The latest edition has completely solution of the unsolved part of the Government Sanctioned Textbook (G.T.B). Moreover they have provided with errors in the questions and answers of G.T.B
Sheth Publications - Problems in Physics [For Numerical Problems]
Uttams Papers With Solutions - It gives complete solutions of Latest Previous Years Board Papers . Also It has Specimen Papers too.
Navneet Log Table Book - It is required to solved difficult problems which has lengthy calculations. Logarithm tables and many tables are requires for preparation of HSC

Chemistry :-
Government Sanctioned Text Book (G.T.B)
Navneet Publications - The latest edition has completely solution of the unsolved part of the Government Sanctioned Textbook (G.T.B). Moreover they have provided with errors in the questions and answers of G.T.B
Sheth Publications - Problems in Chemistry
Uttams Papers With Solutions - It gives complete solutions of Latest Previous Years Board Papers . Also It has Specimen Papers too.
Navneet Log Table Book - It is required to solved difficult problems which has lengthy calculations. Logarithm tables and many tables are requires for preparation of HSC

Mathematics :-
Government Sanctioned Text Book (G.T.B)
Navneet Publications - The latest edition has completely solution of the unsolved part of the Government Sanctioned Textbook (G.T.B). Moreover they have provided with errors in the questions and answers of G.T.B
Neelkanth Publications
Uttams Papers With Solutions - It gives complete solutions of Latest Previous Years Board Papers . Also It has Specimen Papers too.

Biology :-
Government Sanctioned Text Book (G.T.B)
Neelkanth Publications - Steps In Biology
Phadke Prakashan - Biology
Narendra Prakashan  - A Text Book Of Biology
Modern Publishers - Textbook of Modern’s ABC of  Biology
Nirali Prakashan - Fundamental Biology
Balaji Publications - Scholars Biology
Sheth Prakashan - Biological Science
Vision Publicationsm- Biology
Nirmitee Publications - Nirmitee Biology
Uttams Papers With Solutions - It gives complete solutions of Latest Previous Years Board Papers . Also It has Specimen Papers too.

Studying these books will totally complete your preparation for HSC. Buying a G.T.B is a must