Sibuna; And The Son of Osiris (B4 - House of Anubis)

Three years have gone by since Camilla-Ann Rutter gave her life to save her beloved friend, Eddie Miller, The Osirian, and to safeguard the world (though Cammy would never boast about it).

The last three years have been incredibly tough for Fabian Jonathan Rutter, as he tries to navigate life without his twin sister. The sole reminder of her existence is the cat she left behind when she departed. The cat and the cherished memories with his fellow Sibuna housemates are all that connect him to Camilla, as to everyone else, she is forgotten.

One night, a peculiar dream compels Fabian to gather the Sibuna group-Camilla is reaching out to them through an artefact at the British Museum. They hurry to the museum, desperate for answers about her fate. However, as she attempts to communicate with Fabian, Camilla imposes upon him the burden of becoming the god Osiris's babysitter and embarking on a perilous quest, with her life and freedom at stake.

In the Land of the Gods, Camilla is granted another chance at life.

The challenge lies in thwarting the god Set, who seeks to dominate the world again. Together, she and her brother must find a way to stop this and restore Osiris's pure soul. Fabian, accompanied by half of Sibuna, embarks on a treacherous journey around the globe. Meanwhile, Camilla and the remaining members confront divine trials-two quests that bring them closer to unveiling their family's truths and the significance of their lineage, which might hold the answers to their high school challenges.

If you like this book you should check out the rest of the series:

Book 1: Impossible; House of Anubis
Book 2: Unsteady; House of Anubis
Book 3: Endgame; House of Anubis
Book 4: Sibuna; And The Son of Osiris
Book 5; Sibuna; And The Book of Thoth
Book 6; Sibuna; And The Curse of The Pharaohs