Hugo Award 1995, Locus Award for Best Science Fiction Novel 1995.
THE CLONED STRANGERS
Not everyone would envy young Lord Miles Naismith Vorkosigan, even though he had formed his own mercenary fleet before attending the naval academy, and even though his mother was the beautiful Cordelia, the ship captain who has taught the Lords of Barrayar much about the perils of sexism. Even the fact that Miles is third in line to the throne and personally owns a major chunk of his home planet would not tempt any normal person to change places with him.
When assassins came to rid the world of his father, his mother, pregnant with Miles, was in the line of fire, and Miles was but an egg for the omelet in an all too literal sense. Thanks to heroic medical intervention, Miles survived his near fatal brush with war gas – as a pain-filled dwarf with bones as weak and brittle as some malign composite of chalk and glass. Miles is often mistaken for a mutant by his mutant-loathing countrymen.
But there is one who does envy him, who wants to be him: his brother, his cloned stranger formed from tissue stolen from Miles when he was a child. For Mark Vorkosigan was created and raised up for only one purpose: to become Miles, to murder and replace him. In Brothers in Arms that conspiracy was routed and Mark made more or less compliant to his new Miles-less fate. But in the intervening years Mark has learned that without Miles he is... nothing. The new and better Mark doesn't really want to kill his brother, but still it may come to that: Mark to stay, Miles to go...
Lois McMaster Bujold (born 1949) is an American speculative fiction writer. She is one of the most acclaimed writers in her field, having won the Hugo Award for best novel four times, matching Robert A. Heinlein's record, not counting his Retro Hugo. Her novella "The Mountains of Mourning" won both the Hugo Award and Nebula Award. In the fantasy genre, The Curse of Chalion won the Mythopoeic Award for Adult Literature and was nominated for the 2002 World Fantasy Award for best novel, and both her fourth Hugo Award and second Nebula Award were for Paladin of Souls. In 2011 she was awarded the Skylark Award. In 2013 she was awarded the Forry Award. In 2017 she won a Hugo Award for Best Series, for the Vorkosigan Saga.
The bulk of Bujold's works comprises three separate book series: the Vorkosigan Saga, the Chalion Series, and the Sharing Knife series.