Hossein Amini has been hired to write the second part of the His Dark Materials fantasy action/adventure, Phillip Pullman's The Subtle Knife for New Line Cinema.

Currenly shooting in London is the first of the trilogy, The Golden Compass; Chris Weitz wrote the script and is directing, adds Variety. It stars British newcomer Dakota Blue Richards as 12-year-old Lyra Belacqua, who travels to a parallel universe to battle the forces of evil and rescue her best friend; Nicole Kidman, Daniel Craig and Eva Green also star.

In The Subtle Knife, Pullman introduces the character of a 12-year-old boy who has learned the art of invisibility and is seeking his missing father when he encounters a vanishing cat and joins forces with Lyra Belacqua.

No word yet if The Subtle Knife will go to production; it depends on the box office of The Golden Compass which hits theaters later this year.