When you write a book, it is essential, in my opinion to solicit advice from your target audience. If you think you know it all, you're wrong. Readers can point out flaws that you won't see because of the way you think. In my opinion, to write a book well, you need several things including:
- A proofreader other than yourself - Don't try to proofread your own work. It's a good way to miss A LOT of mistakes
- An editor, if you can afford one - Editors are extremely important in helping you craft your work.
- Alpha Reader - This may be your editor, or it could be someone close to you who can give you immediate feedback. They need to be tough on you otherwise their usefulness is limited
- Beta Reader - After taking into consideration the editor and Alpha reader, you need to have other people look at your book before it's released for general consumption.
How should you give them your books? I think that a lot of authors give out their books in chunks to the beta reader. I'm different in that I want to give them the entire book. It's not that the other idea is wrong, but I like being able to let the reader feel the entire flow. I'm afraid if I only give them a couple chapters at a time, they may miss something because of the delay between readings. I used my alpha reader (in this case my lovely wife, who is firm but fair) to look at various passages and chapters as I go through the entire book. My alpha reader is also the first person to read the book in its entirety when it's complete.
So do yourself a favor, make sure you have a beta reader to check your work before you release it to the public. It can only help make your book all that much better.
Good luck and happy writing!