Anne Rice's The Mummy: Or Ramses The Damned #8

This series-adapted, of course, from Anne Rice's popular novel of the same title-finds Ramses alive and well and living in twentieth-century Egypt because of the immortality-inducing elixir he concocted in ancient times. A small portion of the elixir also restores life to the mummy of an unnamed woman in a museum, and Ramses discovers her to be his long-lost love, Cleopatra.