Hi there
The question that you gave is a bit tricky. Because different universities have different syllabus and hence there will be change in the preferred text to be used.
If you could mention your University, I'll be happy to help. All the best

Hey Sami Ali,

The following books are important for CSE students,

 Introduction to Algorithms - Thomas H. Cormen

Algorithm Design - Jon Kleinberg, Eva Tardos

Introduction to Automata Theory, Languages and Computation - Rajeev Motwani, Jeffrey D. Ullman, John E. Hopcroft

Compilers Principles, Techniques and Tools - Aho, Lam, Sethi, Ullman

Operating System Concepts - Silberschatz, Galvin, Gagne

Database System Concepts - Silberschatz, Korth, Sudarshan

 Computer Networks