Zimmer Bradley, Marion, Daw Books Inc., 1978
"During the lawless Ages of Chaos, when the ruling families of Darkover ruthlessly inbred their laran-gifted offspring to gain powerful talents, a baby was born to the lord of Aldaran. This child, born on a dark and thunder-filled night, was possessed of a terrifying and uncontrolled talent: Dorilys, heiress to her father's domain, could unwittingly call forth lightning, even while still a fretful child. Fearful for his daughter's life and the safety of his domain, Lord Aldaran sent to a tower for help. But even the powers of a trained monitor and a Hastur lord might not be enough to save this painfully afflicted and deadly young woman."Stormqueen! occurs two hundred years prior to Two To Conquer, in the period of Darkover's history known as the Ages of Chaos. The underlying theme of Stormqueen! is a breeding program, undertaken over centuries, to produce stronger laran gifts, resulting in individuals like Dorilys and Allart, whose gifts are potentially lethal.Though it is mentioned as an aside, this book contains the moment in the Darkovan timeline when the Ridenow of the Dry Towns overtake the Serrais domain, merging into Ridenow of Serrais.