In case you've put together a manuscript - or any other kind of book - and therefore are now pondering precisely how to proceed with getting it published, stop! Have you re-read your book, improving errors and working on any poor elements in the text? Your answer to this is probably "of course". But have you gone through it multiple times? Again, it's highly likely you'll say "you bet". Have you hired someone that specialises in manuscript editing to look at your book with a fine-toothed comb? The response to this particular question for many writers is a no. If you're one of those authors and have at this point didn't have any success with your work, it might be where you're making a mistake.
The fact is that, you may well be the best writer on this planet, but since you wrote the draft, you are probably not going to detect every one of the issues within your manuscript. You don't want to just rely on software either; it's going to recognise spelling slip-ups, however it really doesn't realise if you've missed out a word, or put ideas in the wrong order, or inadvertently taken out an entire sentence. The difficult reality that many writers find hard to deal with is that they also can't rely on their own eyes to find these types of simple errors: as a writer, you're simply too involved in your own work in order to really stand back and evaluate your book without bias. You may read a phrase through while not noticing that omitted word, since your mind knows what has to be there and fills in the blanks for you. It is really annoying, but it happens.
And then there's the enormous, horrible, novel-destroying mistakes that you might not detect - or not prefer to acknowledge you've detected: the chasmal plot holes, the wooden dialogue, the reality that your antagonist is totally ill-matched for almost all of chapter five with no good reason. Having somebody else to review your novel and make a note of any part they do not understand - or whatever they believe doesn't add up - will undoubtedly be valuable to you.
A good number of authors use friends and relations to 'proofread' their novel, though what normally happens is that the relative or friend comes back to the author pouring out about how perfect the novel is, while not really responding to any of the issues in the book or offering any kind of constructive criticism. This might be simply because they don't like to annoy you, but oftentimes it's because they don't really understand what they're looking for - if they've never edited anything previously, how will they have any idea on how to proceed?
The remedy for this is to hire a qualified proofreader to examine your writing for you - for sure, they will cost you money, but that money won't go to waste. Actually, it might be the best money you spend on your novel, including everything else you dedicate to your promotional plan. A professional will have the ability review your work without bias, be honest in their ideas, and - even more importantly - they will are aware of what is required of manuscripts in the printing industry. They'll are familiar with the grammar rules you need to be following, they will fully grasp how plot as well as structure work, and they will be capable to suggest areas for improvement that you may never have looked into all by yourself.
Browse online for reliable proofreaders and editors - many will offer you assorted solutions for various degrees of editing, and you're likely to discover one that is within your budget.