Two useful, easy to consume versions of The Goal are available... One a book and the other a one-page comic.
There is a new book (available for pre-order) from Clarke Ching, where he has taken the goal and turned it into a comic book: Honey, I shrunk The Goal: The Quick & Easy Study Guide to Eli Goldratt's Masterpiece Business Novel. I read (critiqued) an early version of this, so I am curious to see the final version.
In addition, I just came across a short post on LinkedIn with a comic strip version of the scouting hike with the infamous Herbie by Ganesh Gopal on Lean & Theory of Constraints.