Emeritus Professor Bob Plantz has published the book Introduction to Computer Organization via No Starch Press. Manuscripts of earlier versions of this book have been used in our own "Introduction to Computer Organization" course (CS252), which Plantz both developed and taught. Much like CS252, the book focuses giving programmers a practical understanding of what happens in a computer when they execute their code. The book focuses on x86-64 assembly. A copy of the book has been donated to the SSU library by the author.