Eager to help Mr. Green (Edward Norton) find a cure to his gamma sickness, Mr. Blue (Tim Blake Nelson) sent him a book to help him find a rare flower with medicinal qualities.

This is the hero book seen in the opening credits of 'The Incredible Hulk' laying in a table with some herbs.

This book came with a yellow padded envelope addressed to Mr. Green, supposedly a tool to help Bruce Banner (Edward Norton) locate the appropiate plant to cure his gamma radiation disease.

Besides seeing it in the opening credits we can see the bulky envelope in a couple more scenes.

The book seems real and not just production made, and contains lots of pictures of different plants and flowers.

The book can be matched thanks to certain scuffs in particular places and some dirt on top.