The Mummy or Ramses the Damned

The Mummy starts out full of suspense. The plot is intriguing.
The emotions related to and problems with immortality for the characters were well explored. However, most of the characters are very flat and one-dimensional. This is especially jarring, when through the whole book, only two characters seem to undergo some sort of changes. The most intriguing character only appears in the second half of the book.
However, by the end, the book becomes more stale and hardly anything happens.