Find out why it's imperative to have your book proofread professionally if you want to self-publish.
What is proofreading? It is a systematic scrutiny of your manuscript to pick up spelling mistakes, as well as the odd one or two grammatical errors. It is carried out as the final phase of your project, prior to the manuscript being saved to CD and sent to the printer.
Unlike editing, where the editor's goal is to help you improve the flow, plot and grammatical sense of your book, and you, as the author, may disagree with that editor's ideas - in other words it could be construed as subjective - proofreading is most definitely objective - if something is incorrectly spelled, there can be little argument.
Having a book proofread, the same as having it edited is really worth its weight in gold. I personally read the first chapter of someone's book, it hadn't gone to print, but had been read by at least five different people, and I picked up an error that had been duplicated further on in the book. It goes to show that however good we think we are at picking up mistakes, it's extremely difficult to do.
Also remember that proofreading, like layout and editing, is usually a one-time fee; in other words any subsequent print runs can be taken directly from the CD held with the print house.
Meet the Pathfinder Team of Proofreaders