Template:Item/Series Cultural Groupings And Evolution Series is a pair of book items. These items can be found with the 'unique' tag at Science HQ in World's End. However, it can also be found without the 'unique' label in The Great Library in Black Scratch.
Both book items are considered illegal by The Holy Nation. If held in the player's inventory during a bag search at a Holy Nation town, that character will receive a bounty for holding illegal goods and subsequently attacked and/or arrested.
The first book was written by Idad and the second book was written by the current leader of the Machinists, Finch. ru:Серия книг "Культурные группы и эволюция"