title_body: Are Baen eARC editions generally very different from final published books?
upvoted_answer: The eARC (electronic Advance Reader Copy) editions vary widely in quality because the editor, proofreader and copy editor haven't got their hands dirty. Some are great, some are OK. In every case the final book is better. If you are thinking about self publishing I recommend reading both versions of at least one book. You will come to appreciate Eric Flint's philosophy about delaying publication until his favorite editor has time.
  
  On the other hand if you have to know what happens in the Peoples Republic of Haven, you will not see any plot changes, just grammar, formatting and spelling.