Você está se referindo ao " O Último Teorema " de Frederick Pohl, escrito como uma adaptação do Arthur C. História de Clarke " Sunjammer " (originalmente publicado como "O Vento do Sol")
Por Wikipédia;
O último teorema também tem um consórcio internacional construindo um elevador espacial, a estrutura que você se refere.The solar powered space yacht race [in which the heroine is abducted by aliens] was first featured in a short story of Clarke's, "The Wind from the Sun" (1964), and the concept of a "mysterious Elder Race" deciding our fate, in this case the Grand Galactics, has appeared in several of Clarke's previous novels, including Childhood's End (1953) and the Space Odyssey Series (1968–1997). Some of Pohl's earlier themes also appear here, including his human-machine hybrid which featured in Man Plus (1976)