This is fantastic news!
The Enterprise books published have always held such vast potential that never seemed to bear any fruit. The ENT novels that I've found some enjoyment in were always colored by my greater disappointment in them.
Now with Christopher at the helm, I feel very confident that this potential will be fully realized. Mix in the largely unpainted canvas that constitutes this era of Trek history and I think we, the readers, are in for one fine novel.
Does anyone know if this is the same timeframe that the new book "Federation: the First 150 Years" covers?