Death and burial is my favorite subject, so perhaps I can offer some suggestions.
Aidan Dodson and Salima Ikram's book is The Mummy in Ancient Egypt.
This is one of the most comprehensive texts you'll find on Egyptian mummification and burial, but it does presume that you have at least a moderate understanding of ancient Egyptian death and burial. I highly recommend it.
Ikram wrote her own book, Death and Burial in Ancient Egypt,
that I really enjoyed. She's fast becoming a favorite Egyptologist of mine. This book is accessible to all levels of students of ancient Egypt.
I should also mention one by Carol Andrews called Egyptian Mummies.
This is a rather small and concise book that I was hesitant to buy at first, but I was glad I did. For its size it sure is packed full of educational information.
Already a classic is Bob Brier's Egyptian Mummies : Unraveling the Secrets of an Ancient Art.
Brier is one of the foremost experts in this field and almost always a good read.
I'll also recommend Christine El Mahdy's Mummies, Myth and Magic in Ancient Egypt.
She's also a favorite writer of mine and is very easy to read and understand.
These are just some of the books I have in my own library at home, and I could go on and on, but I don't want to subject you to mummy overload! Most (if not all) of these titles should be available through local public libraries. I believe this is the book
which Merytre-Hatshepsut recommended (Smith's The Royal Mummies).
I don't have this one yet but she's mentioned it to me before, and I'll most likely purchase it; it seems stuffed full of very useful information and technical data. You can see by this link that the book was recently revised, too (that's always a plus).
I cannot read enough about this subject myself, Living Dead, and I hope this is of some assistance to you. Let me know if I can do anything more.