The next Shanakan book (Number 7), The Shadow War, has been through its first edit pass and work on the cover is at an advanced stage. I expect to be ordering proof copies within the week. As those who follow the process will know, it takes a couple of weeks for the proofs to arrive and a few more after that for my readers to get back to me with comments.
At this point I expect there to be at least four more Shanakan books, but it may go up to five to make the round dozen.