A national book review is a critical analysis and evaluation of a book that is published on a national scale. These reviews are often written by professional book critics or journalists and are typically featured in national newspapers, magazines, or websites. National book reviews provide readers with an in-depth look at a book's content, writing style, and themes, helping them make informed decisions about whether or not to read the book. These reviews can also influence the book's sales and overall reception in the literary world.