How you do it in AE should be very similar to how you do it in Motion. In a nutshell you just need to get your "book" broken into layers so each item can pop up out of the book. Before you animate each pop up item adjust its anchor point to say the bottom of the object if you want to adjust its rotation so it appears as if it is flat on the book and then rotates up. Its all about where you move the anchor point. Because it defaults to the center. Hope this helps and best of luck.