The Gift of Power is the title for the first part in a triology (Exile) featuring Numair and detailing his years prior to the events of Wild Magic. She expanded her idea of a duology, because Numair's early years were so complicated. The book is currently set for publication in 2017.
Quote from Tammy:
"At the moment GIFT is scheduled for spring 2017. That may change, since I've just gone from a duet to a trilogy, but it will still be 2017. I will be apologizing for this for a while, but Numair's younger life was so complicated!"
"In which we learn of Numair's last years at the university of Carthak, the beginning of his conflict with the newly-made Emperor Ozorne (Numair's best friend), his quick departure from Carthak, and how he survives afterward."