I've just hugely enjoyed reading George Orwell's 1946 essay Confessions of a Book Reviewer:
The great majority of reviews give an inadequate or misleading account of the book that is dealt with. Since the war publishers have been less able than before to twist the tails of literary editors and evoke a paean of praise for every book that they produce, but on the other hand the standard of reviewing has gone down owing to lack of space and other inconveniences. Seeing the results, people sometimes suggest that the solution lies in getting book reviewing out of the hands of hacks. Books on specialised subjects ought to be dealt with by experts, and on the other hand a good deal of reviewing, especially of novels, might well be done by amateurs. Nearly every book is capable of arousing passionate feeling, if it is only a passionate dislike, in some or other reader, whose ideas about it would surely be worth more than those of a bored professional. But, unfortunately, as every editor knows, that kind of thing is very difficult to organise. In practice the editor always finds himself reverting to his team of hacks —his “regulars”, as he calls them.