"Communication Research" is useful tool for understanding the research process. It splits research methods into two basic types: quantitative and qualitative, and discusses the differences and similarities of both. Much space is also devoted to statistical methodology.
The book does not do much to cover the foundational theories in the communications field. It can be repetitive and overly wordy at times. Understanding the overall process can be confusing because some chapters describe both qualitative and quantitative approaches, while other sections place the two approaches into separate chapters.
It is definitely worth the time and effort if you want to learn how professional research is conducted.