Beta readers are a blessing to all writers. My beta readers helped me see things I never would have from my myopic standpoint. How many times can I reread my work before it transforms into a continuous blur of words and punctuation? The answer: frighteningly few.
In short, I need my beta readers like an astronaut needs oxygen. So, to make their job easier, I created a short list of what I would like them to look for while they MULL over my manuscript.
Tell me when I reveal too much. I need to know when I repeat myself. For example, if a certain phrase is overused, or if I persist in explaining what motivates a particular character one too many times it becomes too much. Also, if there is little variety in my scene setting, I would like the opportunity to make a change and induce more interest. You, as the reader, will sense when there is too much of something when you feel bored or uninterested. There will also be times when I articulate facts that you already inferred. That is a case of giving too much information. When I do this, I upset the symbiosis between author and reader, something I never want to do.
As you MULL over my manuscript, other thoughts may occur to you and, of course, they should be expressed. But, I have found, that the three concepts outlined above are those most critical to creating a satisfying story.