The Summer Queen is a 1991 science fiction/fantasy novel by Joan D. Vinge, the sequel to The Snow Queen. It was nominated for the 1991 Hugo Award for Best Novel and Locus Award for Best Science Fiction Novel.Moon Dawntrader, a clone of the former Snow Queen, has become the Summer Queen on the planet of Tiamat. She must now endeavour to introduce technology to the Luddite Summers while keeping the mers safe from extinction. Their demise would bring about nothing less than the collapse of the empire's biggest kept galactic secret. Source: Wikipedia (en)