Eric Brown 
Binary 

On what should have been a routine mission to the star system of 61 Cygni A, Delia Kemp finds herself shunted thousands of light years into uncharted space. The only survivor of a catastrophic starship blow-out, Delia manages to land her life-raft on the inhospitable, ice-bound world of Valinda, and is captured by a race of hostile aliens, the Skelt.As the long winter comes to an end and the short, blistering summer approaches, the Skelt will stop at nothing to obtain Delia’s technical knowledge – but what Delia wants is impossible: to leave Valinda and return to Earth.