1. Digital Design: with an introduction to Verilog HDL by M. Morris Mano and Mechael D. Ciletti, 5th Edition, Pearson Education, 2013.
2. Advanced Digital Design with the Verilog HDL by Michael D Ciletti, 2nd edition, Pearson education, 2017.
3. Fundamentals of Logic Design by Roth and Kinney. 7th edition, Cengage learning, 2014
4. Digital system design using verilog by Roth, John and Lee, 1st edition, Cengage learning, 2016.