Books for CA Final
Financial Reporting : M P Vijay Kumar.
Accounting Standard : DS Rawat.
SFM : Shridhar.
Law : Munush Bhandari.
Costing : Paduka
Audit : Surbhi Bansal/ Prakhar Sharma
IDT : Bangur
ISCA : Paduka/ Dinesh madan
DT : Vinod Gupta.
And Practise Manuals of ICAI are also very useful..
and regarding your question about self study or coachings i want to say that it does not make much difference. since i passed CA by self study i know that it just takes some more time, since you have enough time try to go for self study and take coachings of subject in which you find difficulty...