Direct tax book for ca final

USE BOOK OF AUTHOR T N MANOHARAN

OR 

YOU MAY ALSO PREFER VINOD GUPTA BOOKS.

PLUS MUST

1. SUPPLEMENTARY STUDY MATERIAL FROM ICAI

2. CASE LAW BOOK FROM ICAI

THE ABOVE IS SUFFICIENT FOR EXAMS & KNOWLEDGE BOTH.

Agree with Sir CA Jignesh above.

Vinod Gupta is the best. But it is very vast and time consuming also. In case you are constrained for time, then go for TN Manoharan.