Conversation so far:
who plays sam in i am number 4
Callan McAuliffe is the Actor who portrays a version of Sam in the 2011 movie adaptation of I Am Number Four.
who produced i am number 4
The film I Am Number Four is produced by Michael Bay.
what was the budget for i am number 4
The Hollywood Reporter estimated the budget of the film I Am Number Four to be between $50 million and $60 million.

Question: is the movie based on a book
Self-contained rewrite: is the movie i am number 4 based on a book