Mummies, Pyramids, and Pharaohs: A Book About Ancient Egypt by Gail Gibbons
This was one of our most favorite books for Egypt. An excellent broad overview for the elementary years. After reading lots of other books about Egypt, this being one of the last, I said "Finally, the book I wanted to use all along." We'll definitely use this again.
The pictures are all illustrations so I made sure we looked through some other books to see actual pictures of pyramids and mummies and all that other cool stuff.