In other Primaris news, two very cool looking single miniatures - the Chaplain and the Apothecary. The Apothecary has an optional helmeted head and a cool scenic base, where the Chaplain is what you see is what you get!
White Dwarf is out next week and they're trumpeting the return of Index Astartes as a feature - could this be the time they start a new run of retconning to bring the Primaris into the fluff?!
In the world of novels, Lord of Undeath which sees Nagash enter the Realmgate Wars and Tallarn which is all of John French's previous Tallarn works in one book. Could be worth a look!