for Numerical Methods I would suggest 1. Numerical Mathematical Analysis, Sastry, PHI this is a good book but too detailed mainly for BSc students. 2. Introductory Numerical Analysis (Dutta & Jana) suggested if you want to study in a detailed manner. 3. Computer Oriented Numerical Methods - V Rajaraman. Excellent reference to study in brief 4. A text book of Numerical Analysis - DC Sanyal, K Das. best book i think for CSE/IT students with algorithms and programs in C.