The Samantha Sutton books are an excellent series for young readers having stories based on antiquities issues at their centre:
'Samantha Sutton and the Labyrinth of Lies' – 2012 (looting in Peru)
'Samantha Sutton and the Winter of the Warrior Queen' - 2014 (metal detecting in the UK)
and number three....?? From author "It's one thing to see ancient Khmer hells as carvings...another to visit them, as Samantha Sutton will soon find out". I have long been sure that the many twists and turns of the Koh Ker case have shown that there is scope here for a story with lots of colourful and creepy characters.