Storm Warning is the ninth book in The 39 Clues series. It is written by Linda Sue Park and was released on May 25, 2010. The geographical coordinates that appear on the ship on the book's cover (18 degrees, 15 minutes north; 77 degrees, 30 minutes west) indicate a point about six kilometers southeast of Albert Town, Jamaica.
The cover and title was revealed April 5, 2010 by Entertainment Weekly.
Read more or edit on Wikipedia