Are there just two Romulan War books?
Just two under the banner title of The Romulan War
, but essentially all four post-finale ENT novels to date (The Good That Men Do, Kobayashi Maru, The Romulan War: Beneath the Raptor's Wing
and The Romulan War: To Brave the Storm
) form a single 4-part story arc starting with the buildup to the war and concluding with the founding of the Federation.