Well look at these beautiful covers! Those lovely folks at Jedi Bibliothek found the first two and Star Wars unveiled the up and coming Doctor Aphra comic that will start on December 7th written by the superior Kieron Gillen.
We can only guess that the Baze and Chirrut novel, written by Greg Rucka (Before the Awakening, Shattered Empire), will focus on how these two rebels came together, we obviously don't know much about these two as Rogue One hasn't been released but any back story is good story in my opinion!
The Jyn Urso novel is written by Star Wars debutant Beth Revis, who's jovial blog post details how the book came about - obviously she reveals nothing about the plot but again, more story about a character who I'm sure is going to become a firm favourite. The big question is whether or not this is before or after Rogue One? As you know...I'm expecting the rebels to die... *whimper*.
Canon has never looked better, we have a lot to look forward to!