Indian author: Jain and Iyengar Numerical Methods: Click here to download Jain and Iyengar NT For alternate link: Click here to download Jain-Iyengar-Numerical-Methods-www.extcresources.blogspot.in For Numerical Differentiation my recommended book is: Numerical Differentiation:Chitode Click here to download Numerical differentiation For alternate link : Click here to download Numerical Differentiation:Chitode For better understanding of concepts and formula Steven Chapra is recommended: Click here to download Chapra For alternate link: Click here to download Chapra For solution manual of Steven Chapra: Click here to download Steven Chapra Solution manual For alternate link: Click here to download Steven chapra solution manual