Crocodile Tomb (Gods and Warriors Book 4) Penguin Random House Children's UK

Hylas and Pirra have found their way to the mysterious land of Egypt in pursuit of the dagger of Koronos, only to find that the Crows have got there first. Led by Hylas's deadly enemy, Telamon, they are determined to recover the legendary blade, by any means necessary. But the dagger now lies buried beyond the reach of mortals....