There is a very interesting and quite enjoyable alt-fanfic with orcs as the protagonists. Mordor as industrialised and organised, frequent reference to following the Field Manual while on mission
Written about 20 years ago by Kirill Yeskov, the Last Ring-Bearer tells the story of the Lord of the Rings from the perspective of two orcs.
The events and backstory of Tolkien's work are not so much changed as re-interpretted, and the war cast as a conflict between the scientific, industrial east, and the superstitious, magic-working west.
The POD is not so much a single event, but a change in our understanding of the macro-relationships of the peoples of Middle-Earth: What if the elves were not merely a patronising but broadly allied elder race, but in fact saw humans and other sentients as lesser species, tools to use at their will to accomplish their race's goal? There are of course elements of this in Tolkien's work - and more so in Jackson's - but Yeskov's novel takes this a lot further.
It is basically a thriller, set in Tolkien's world viewed through an alternative perspective. The changed perspective is fascinating, and Yeskov created some depth to Mordor society, orc culture and the industrial revolution in Middle-Earth which is quite enjoyable