Wren longs to escape from Anchorage. She craves the dangerous adventures her parents once had - and a charming submarine pirate is ready to take her to sea. But the object that she steals for him ignites a conflict that will tear the whole world apart... The third thrilling instalment of Reeve´s critically acclaimed MORTAL ENGINES quartet.Tom and Hester´s daughter, Wren, longs to escape the peace of static Anchorage. She craves the dangerous adventures her parents once had - and a charming submarine pirate is ready to take her to sea. But the mysterious object that she steals for him ignites a conflict that will tear the whole world apart...