I highly recommend almost every book I read. This book, however, does not fall into that category.
John MacArthur, in The Truth War, certainly has much good to say. As is typical with MacArthur, he doesn't pull any punches. MacArthur stresses the importance of biblical truth being objective as opposed to subjective. Biblical truth is determined by God, not by human feelings.
MacArthur rightly criticizes the postmodern view of truth, which suggests that truth is ultimately unknowable. Postmoderns, instead of seeking truth, stress a warped humility that suggests that truth is beyond us. What this leads to is relativism and subjectivism.
In talking about postmodernism's seeping into churches, MacArthur speaks out against the false teachings of Brian McLaren. McLaren has written several books from a theologically postmodern view. His most well-known work is entitled A Generous Orthodoxy. MacArthur correctly criticizes McLaren for his refusal to stand up for the truth of the core doctrines of the Christian faith.
MacArthur also describes emerging churches, which are generally churches that adhere to postmodern thought.
Most of what MacArthuer writes needs to be said. For that, I appreciate this book.
The problem with The Truth War is that it seems somewhat repetitive and redundant. I could have read the first two chapters and that would have been enough. The remainder of the book seems to rehash what has already been said, while adding a few more details.
If you have studied postmodernism before, then don't bother with this book. If you have not looked into the problems with postmodern thought, then I recommend that you check this book out of your local library and read the first two chapters. That will be enough.