Isn't it wild, people reviewing a book they've never read? E.g. Megan McArdle’s column for Bloomberg View.

I apologize in advance, because I am going to talk about a book that I have not yet read. To be clear, I intend to read Thomas Piketty’s “Capital in the Twenty-First Century.” It is sitting on my (virtual) bedside with a big stack of other (digital) books that I intend to read. But it’s far down in the queue, and I’m afraid that I can’t wait to weigh in—not on the book itself, but on its topic.

I've heard this book will likely win the Nobel prize for economics, due to the statistical work Piketty has done.