2. An introduction to automata theory and formal languages By Adesh K. Pandey, Publisher: S.K.
Kataria& Sons
3. Introduction to computer theory By Deniel I. Cohen , Joh Wiley & Sons, Inc Click here
4. Computation: Finite and Infinite By Marvin L. Minsky Prentice-Hall
5. Compiler Design By Alfred V Aho, Addison Weslley
6. Introduction to the Theory of Computation By Michael Sipser Click Here
7. Automata Theory, Languages, and Computation By John Hopcroft, Rajeev Motowani, and Jeffrey
Ullman click here