• Engineering Electromagnetics with CD (McGraw-Hill Series in Electrical Engineering)
• Linear Systems and Signals (The Oxford Series in Electrical and Computer Engineering)
• Discrete Mathematics with Applications
• Embedded Microcomputer Systems: Real Time Interfacing
• Fundamentals of Logic Design (with CD-ROM)

good book
This book is very accessible and the TExAS simulator is useful for learning. However it is good to have a general idea of how a computer works before you read this book, so I would recommend reading the introductory computing book by Patt and Patel first.