One of the most difficult thing a painter has to learn is to stop working on a canvas because the more he looks at it , the more he see things he may or feels like to change.
So may I suggest you to go and try to focus on a landscape , a plant, an animal you like and to give it all your attention and gratefulness for some time. Then come back to your book and do the first thing that comes to your mind. You may be surprised. Ask Blair, this can be effective.
And don't forget to rest, the nature does it too.
Take care gifted lady.