The Golden Rendezvous by Alistair MacLean

The Golden Rendezvous is a modern tale of pirates. A tramp steamer, with the absurd idea of having A1+ cabins for the ultra rich, meanders from port to port. It is hijacked by some of its own passengers and sails on with murder and mayhem to an expected destination. After a slow start, it is fast paced with excitement reminiscent of James Bond.