Apocrypha of Skaros: A later Apocrypha than the Apocrypha of Davio. It also lists all of the Space Marine chapters but includes 23 Second Founding chapters for the Ultramarines, although they are left unnamed.
Real-world reference: 'Skaros' is also the name of the Dalek's homeworld in 'Doctor Who'. Whether this is an intentional reference by GW is unknown...
Source: Codex: Space Marines, 3rd Edition by various
Submitter: IBBoard and Simguinus
Hive World Terra