for fmge preparation you should go with kamalkv's objective books DNB+FMGE 

There are many books available in the market but I would suggest you to choose the standard books only as these will be easy to understand and will be good to build the concepts strong as well. Also, below I am mentioning few books which you can follow -

Pre-Clinical Subjects -

Microbiology & Forensics - Jain/Chaurasia or Arora Book by Dr. Vikas

Physiology & Pathology - Review of Pathology by ‘Dr. Govind Garg & Dr. Sparsh Gupta’

Pharmacology - Review of Pharmacology by ‘Dr. Govind Garg & Dr. Sparsh Gupta’

Biochemistry - Satyanarayan

Anatomy - ACROSS Book

Clinical Subjects -

Medical - Mudit Khanna MCQ Internal medicine

Surgery - Amit Tripathi and Ashish Gupta Rachna Chaurasia / Arora

PSM - Review for PSM by ‘Vivek Jain’

Ophthalmology - ‘Dr. Ruchi Rai’ for Ophthalmology

Obstetrics & Gynaecology - Review Book by ‘Dr. Sakshi Arora” Review Book by Harmeet Goyal

Paediatrics - Jitendra Talekar Notes by ‘Dr. Marwah’

Good Luck!!!