Systems Design and the 8051 by Marcus O. Durham

Digital Electronics: Principles, Devices and Applications by Anil Kumar Maini

Fundamentals Of Switching Theory And Logic Design by Astola Jaakko T

Modern Digital Electronics by R P Jain

Fundamentals of Digital Logic and Microcomputer Design by M. Rafiquzzaman

Problems and Solutions in Electronics by Roger Loxton

Digital Design (3rd Edition) by Morris Mano, M. Mano