The secret chamber - Patrick Woodhead

A young English doctor disappears into the Ituri Forest in Northern Congo. No one who goes there ever comes back, so Luca Matthews, a brilliant climber, is tasked to find him. Mining troubleshooter Beatrice Makuru ventures into the same region. Coltan, the mineral essential for every laptop and mobile phone, is running dry. With its increased demand, the Congo is the key to the mystery. And whilst the new wave of Chinese demand grips Africa - the race is on for its mineral wealth. Meanwhile, in the depths of the forest, a plan takes shape which will rock the civilised world... With the world's eyes turned towards the Congo, Luca and Beatrice are embroiled in a mystery far more dangerous than a simple quest for a friend.