Here's a great resource for anyone looking to create talking powerpoint books. The first file gives step by step directions for creating such a book, including how to add the audio. The directions are specifically for Powerpoint 2003, but if you are familiar with 2007 you can make them work. The second file below is a basic template for a powerpoint book. The forward and backward arrows are programmed in and all you have to do is plug in a photo, and type in some text.
Creating Talking Powerpoint Books
Powerpoint Book Template
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