She's writing at least a trilogy*. Glasslands
has been out since October, though I haven't read it yet. The Thursday War
will be released this October.
I still need to find time to read Greg Bear's Primordium
, and to pick up the Evolutions
(* I say "at least a trilogy" because it seems the announcement about Glasslands
indicated she was signed for "a multi-book series" without indication as to how many books that would be. Some sites I've looked at cite her current books as a trilogy, while the Halopedia Wiki says that the current post-Covenant War book series has "multiple unannounced sequels.")