appendix material. The whole part of Azog chasing Thorin and co from Rivendell all the way to Lake Town didn't happen. The big fight scene with Smaug in the forges of the Lonely mountain was a movie only event. The romance was obviously movie only. All of the Legolas scenes (the cartoonish barrel fight, his quest to Gundabad, etc) were movie originals.

Fans on reddit have made what they call the tolkien edit of the hobbit. It includes only book material, and it cuts the 3 hobbit movies down to about 4 hours in total.