The A.V. Club has the full story on how this thing came to exist, along with a look at one of the pages. 

Basically, comedian, artist and author Doogie Horner was asked by his publisher to pitch adult coloring book ideas.  He proposed doing one on classic 80s movies, and his publisher Harper Collins came back with the rights to the Bruce Willis blockbuster (and greatest Christmas movie of all time) Die Hard.  Horner looked at 7,000 screenshots from the movie to decide which moments to illustrate.

Die Hard: The Authorized Coloring And Activity Book is out now and available in stores and on Amazon.