Tutankhamun and the Daughter of Ra is part of the ‘Egyptian’ sequence, which also includes Akhenaten: Son of the Sun and Hatshepsut: Daughter of Amun. Chronologically, Hatshepsut: Daughter of Ra is the last book of the sequence.
From the blurb on the Arrow edition:
Ankhesenamun has never been safe in all her short life – not even with her beloved husband and half-brother, Tutankhamun.
Daughter of Pharaoh Akhenaten and the fabled Nefertiti, and married at one time to her father, she has seen too much intrigue, too many deaths … Forced to marry Tutankhamun by the powerful General Horemheb at a time of bitter political and religious division, Ankhesenamun is the delicate link between scheming factions.
Left vulnerable by the failure of her plans for the sacred egg of Ra and the death of her young husband, Ankhesenamun is forced into making one last extra- ordinary and desperate bid for life and happiness …
First published 1990 in paperback as Daughter of Ra by Arrow Books Limited (ISBN 0099598701).