There are 2 books in the Amira & Hamza, 1 series. The newest book is The Quest for the Ring of Power which came out in 2022.

1
The War to Save the Worlds

Book cover of The War to Save the Worlds
A Kirkus Best Middle Grade Book of 2021

From bestselling author Samira Ahmed comes a thrilling and magical adventure intertwining Islamic legend and history, perfect for fans of Aru Shah and the Land of Stories.
 
On the day of a rare super blue blood moon eclipse, twelve-year-old Amira and her…
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2
The Quest for the Ring of Power

Book cover of The Quest for the Ring of Power
Amira and Hamza are back in this epic sequel, which takes readers on a thrilling magical adventure as the siblings face their most terrifying and formidable opponent yet.

All human and jinn kind shall bow down to me. Control the Ring, control the worlds.
 
Amira and Hamza have returned from…