Ideal for self-published authors; I would not recommend this service for those pursuing traditional publishing, because if you are lucky enough to be taken on by a traditional publisher they will handle all of that in-house.

Proofreading is the final stage before a book goes to publication. It happens after copy-editing and before typesetting. While copy-editing and proofreading fall under the umbrella of ‘mechanical editing’ (and there is some overlap), proofreading specifically addresses surface level typos and formatting inconsistencies.