Beyond Opinion is a good collection of essays united under the broad theme of Christian apologetics, with introductory remarks and a conclusion by Ravi Zacharias that lay out the specific goals and themes of the book--to show the need for apologetics and outline the different kinds one may encounter in our postmodern world.
The individual chapters showcase the expertise and first-hand knowledge of a number of respected authors and apologists, with stand-out sections by Alister McGrath, Joe Boot, John Lennox, and Zacharias himself. Among the topics covered are Islam, atheism (specifically, the virulent strain exemplified by Sam Harris and Richard Dawkins), eastern religions, science, suffering, persecution, and psychology.
The book's weaknesses are few, but obvious given the limitations of space and the breadth of the subject. Some of the material is not treated deeply enough and, in a handful of places, the essays seemed unfocused or rushed. The biggest flaw is nothing peculiar to this book, though--as with any collection of essays, some are just not as good as the others.
That said, whatever problems the book has are easily outweighed by the wealth of information and thought packed into a little over 300 pages. Beyond Opinion is an ideal introduction to apologetics for anyone interested in the defense of the faith.