These are the main general travel guides.
Imagining Egypt is a manageable book about Ancient Egypt. It is quite detailed and well illustrated so that you can relate it to the sites you will visit. It is a bit heavy to carry around though!
The Arabs: A History is a regional history covering the events, colonisation and the lead up to war across this area.
A interesting book about the Grand (or Palace) Hotels of Egypt and their history. Learn about the Winter Palace, the Old Cataract and more.