Template:Item/Series Okranite Theories In Relation To Findings Series is a collection of book items. These items can be found with the 'unique' tag at Science HQ in World's End. However, they can also be found without the 'unique' label in The Great Library in Black Scratch.
The first book was written by Sabina and the second book was written by the current leader of the Machinists, Finch. The example that Finch cited from Atticus is from Mass Extinction III. ru:Серия книг "Применение окранитских теорий в изысканиях"