X Marks the Spot

What readers are loving about X Marks the Spot:
''Reads like an Indiana jones novel, full of adventure and discovery'' ⭐⭐⭐⭐⭐
''A cracking good read'' ⭐⭐⭐⭐⭐

''Fascinating'' GREG JENNER
''I couldn''t put it down'' JANINA RAMIREZ
''Alive with the spirit of adventure'' RANULPH FIENNES
''If you love Indiana Jones, this is the real thing'' DAN SNOW

Ancient shipwrecks in crystal seas, mythical princesses pres...