Charles H Roth, Jr. (1932–2022)

I teach a digital systems class using this textbook. As with all textbooks it has its flaws, but I think the information is organized in a way that makes sense. (Update in 2023: I no longer use this textbook as of 2021, but not due to faults of the textbook necessarily. I switched to OER as my students benefit from free textbooks.)

An excellent book for undergrad. The exercises are designed to walk you through logic design. Once you master this material, you are better off with a more concise book.