If I remember right during reading the appendices at the end of Return of the King he states that he based the industrialization of Isengard on the industrialization of the countryside in the North.
But please donāt get me started on LotR or I will rage about the movies, excellent though they were, I find peter Jacksonās claims that he read the books extensively laughable when you compare the books to the movies.
Arwen. In the book. Hardly mentioned. It was Glorfindel the Elf Lord who found the Hobbits and Aragorn after Weathertop, it was Glorfindel who led them to the Ford, it was Glorfindelās horse Asfaloth who was strong enough to bear Frodo safely and outrun the Ulairiās horses (Nazgul only refers to the Ringwraiths in Black Speech when theyāre mounted on their flying steeds) and it was Frodo alone who stood against the Ulairi at the Ford. And he crumbled pitifully at the command of the Witch King. The river rose itself upon it sensing the Ulairi started to cross but Gandalf did enchant it with the white horses. 5 Ringwraiths were swept away in the flood, the other 4 were driven into the Ford by their horses when they saw Glorfindel reveal himself to them in his full power.
In the moviesā¦ Well. Gotta give Liv āThe only actress so wooden she could have been an Entā Tyler a little bit more screen time than her usual of crying on cue. Being the daughter of someone famous also helps.
The lack of Tom Bombadil and the Barrows of Carn Dum.
In the books. The only other person in Middle Earth who is completely incorruptible by the Ring. In fact when he puts it on after Frodo willingly just hands it to him, he doesnāt even disappear and hands it back without a second thought. Also revealed in the Council that he would pay it no attention whatsoever and therefore would be the worst Guardian of it, powerless as it is on him. I can only guess Jackson removed all mention of him as he wanted the Ring to be all powerful over every single living thing in Middle Earth, and Bombadil made a mockery of that.
The Barrows of Carn Dum. Important to the lore as they were tombs that contained the southernmost graves of the corrupted Men at the very southern border of the Witch Kingās realm of Angmar. Frodo and the hobbits were warned not to go there by Bombadil but were lured there and trapped by a wight who nearly killed all 4 hobbits until Frodo woke from the spell and sang for Bombadilās help in destroying both curse and the wight.
Saruman in the movie suddenly disappeared (unless you watched the extended version of the Two Towers and even thenā¦ lolā¦) which of course meant missing out an entire sub story of the Shire.
In the book after his defeat at Isengard he pretended to be a wandering beggar making his way northwards, hitherto unknown to the Fellowship who come across him with Wormtongue while leaving to join his his Men to over run the Shire and offering positions of power to hobbits such as Sandyman. which he already had spies and servants at work there long into the War of the Ring, subtly corrupting the Shire. After the war of the Ring ended and the hobbits parted company with the remaining Fellowship they returned to the Shire after being warned by Gandalf that all was not as it would seem when they returned. They return to find it over run with Sarumanās remaining army and organise the Shire into resistance, ending in the final battle of the War of the Ring which ends in Saruman being told to leave the Shire, and after Frodo offers Wormtongue refuge, saruman abuses him and Wormtongue cuts his throat then is shot by the hobbit army.