This book is a very detailed, comprehensive look at social media marketing, pitched at the beginner-early intermediate market. Paul Gillin is the former executive editor of the Computerworld technology news weekly. (Full disclosure: I know Mr. Gillin, and some of the people profiled, quoted in the book from when I worked in PR and marketing, within the technology events industry.)
Two very strong points of the book, both within the final third of the volume. The chapters on planning social media, as well as the research and measurement chapter. Social media has exploded since then, and entire books have been written just on measurement. I would still recommend this book if you were just starting out, and planning a social media strategy for your small to medium- sized business. The book is well outlined.
I cannot give it a top score because the book was published in 2009*. (*MySpace, Prodigy and Second Life are now in obscurity zone. I hope Paul Gillin can someday produce an updated 2021 volume. The book's two weak spots are that it's dated, and also that it goes into so much detail in a few sections, that you'll be winded. (So overall score: 3.8-4.3 stars)