Study mat. for ipcc

Hi, Its regarding the IPCC both group.

Can someone please suggest me :

1) Whether the study mat. ( as issued by Instittute) is sufficient for exam prepareation or not.

2) If no, then can you please suggest me the books/auther/publisher name on subject wise which need to be refer.

3) Futher, If it paritially then please suggest me which is preferable.

Thnak you in advance, for your help.