The Sky Is Falling
Sidney Sheldon

Her Sarajevo ward Kemal gets expelled, a prosthetic arm, then often naps afternoons under care of kindly new housekeeper. Unseen agents follow her, bug hotel rooms, while an evil mastermind voice overhears taped conversations and supervises regular secret auctions, inviting armed wealthy customers. Witnesses and informants die before, and after meetings. Friends become foes, nobody can be trusted.