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...