Appar Urja

Marusthal: Bestseller Book by D.D. Ojha: Marusthal

Earth and Ocean : Useful Resources (Hindi)

Surya: Bestseller Book by D.D. Ojha: Surya

Vayu Pradushan (Hindi)

Dhwani Pradushan: Bestseller Book by D.D. Ojha: Dhwani Pradushan

Nabhikiya Oorja: Bestseller Book by D.D. Ojha: Nabhikiya Oorja

Oorja: Bestseller Book by D.D. Ojha: Oorja

Chandrama: Bestseller Book by D.D. Ojha: Chandrama

Harit Rasaayan (Green Chemistry) (Hindi)