The Timorans. The Cavaliers, #7

The inhabitants of Ciroth knew the end was coming, and to save their civilization, they built the great colony ships, departing their homeworld in six directions. One ship went to Terradia; its people became one of the founding worlds of the Fellowship. One ship went to the twin worlds of Timora and Tamora, sharing an orbit around their sun. The gravitational perturbations became too much, and the twin planets began tearing each other apart.
It was time to move on again. Cavaliers Skywyn and Laren work to save as many citizens as possible, before adjusting to a new shipboard life in their cobbled-together fleet with their son Skylar. The remnants of the Timoran colony seek a new home with one of their sister-colonies, but face a lack of fuel, the deadly environment Ciroth has become, and a food crisis. Will the fleet reach Terradia before it's too late?