Read a book from your book box. Think about the author's purpose- Why did the author write this book? 1. Click . 2. Choose to add a photo and take a picture of your book cover. Click on the green check . 3. Choose to add a caption . Type a sentence to tell the author's purpose for that book. Click on the green check . 4. Choose to record . Record yourself explaining how you knew that was the author's purpose. Be sure to talk about evidence from your book as you explain. 5. Click on the green check to finish.