Book reviewers are those that read books and review them, either on an amateur basis or as a professional. There are plenty of professional book reviewers that read books for a living and then write articles about these books, either recommending them or not recommending them. Book reviewers will read the book and then give a prospective reading a quick synopsis of the book without giving away any spoilers.
The book reviewers will usually tell the reader that they either liked the book or did not like the book within the first few paragraphs. The reader of the review will also be privy to why the reviewer did not like the book, without any many secrets or twists to the plot.
Because of the internet, there are amateur book reviewers all over the place. Anyone can review a book online. If you are looking for a start in this career, you can do so by reviewing books online. Although you will not get paid for this, you can use your reviews as clippings if you are looking for a job as a reviewer.
Book reviewers do not have the most glamorous of professions but it is steady work. Many book reviewers go on to write their own books, eventually, If you are considering writing your own book, one of the best ways to get started is by reading other books in the genre. If you become somewhat of an expert on the genre, you can then become one of the many book reviewers to whom others turn when they consider purchasing a book. Just as movie reviewers can have somewhat of an influence over the movie industry, you can have somewhat of an influence if you begin to publish your book reviews in places like The New Yorker or the New York times, both of which feature the top book reviewers.
If you have a book that you want reviewed, you can ask others who read in this genre to give your book a review. Some writers will have several book reviewers that they will use to tell them if they need changes in a story such as the plotline is too thin or the characters too one dimensional. Book reviewers also work as readers in large publishing houses to determine whether to recommend them to the publisher.