Hi, a warm welcome to the site.
Firstly the books. Don't buy more unless you can preview them in hand. You might find that you need to use the index and keywords to find relevant chapters/information.
The two variations of assessment criteria 3.1 do match as you are explaining how you monitor children's development through the infomation you've collected/gained in your setting. You may also find that what happens in your school to track progress is something you discuss during a visit with your assessor?
With a thought towards plagiarism xx
this thread may help
Best wishes xx