The most difficult part of writing a book is not devising a...

The most difficult part of writing a book is not devising a plot which will captivate the reader. It's not developing characters the reader will have strong feelings for or against. It is not finding a setting which will take the reader to a place he or she as never been. It is not the research, whether in fiction or non-fiction. The most difficult task facing a writer is to find the voice in which to tell the story.