Es dificil escribir sobre este libro sin desvelar nada.
El libro esta dividido en 3 "shifts". Y cada uno tiene dos historias que se escriben en paralelo aunque quiza no ocurran en paralelo. Por ejemplo el primer shift consiste en dos historias una ocurriendo alrededor de ~ 2050 y otra alrededor de 2110.

Al principio esta bien pero despues de 300 paginas de cambiar de una historia a la otra y de vuelta a la misma, este sistema se hace un poco pesado.
Ademas no todas las historias son tan importante a la larga. Es un poco deprimente interesante en un personaje para que este desaparezca por siempre del libro.
Por eso le bajo la puntuacion a 3 estrellas. La mayoria del tiempo estaba pensando que le daria cuatro, no esta mal y hay un punto en concreto (el principio del tercer shift) que me parece una muy buena sorpresa. Ya lo vereis.
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Excellent second book - so good I ran off into the third book without remembering to note I'd finished it! ( )

Riveting continuation of the story from Wool. Lots of mysteries resolved with new ones created along the way. Couldn't put it down for four days. ( )

Shift is the prequel to the events in Wool, the first in the Silo trilogy, and while it does fill in a lot of the background that was conspicuously absent from the first book, overall it raises more questions than it answers. If you’ve already read Wool I'd say your options are to consider it to be a stand-alone (from the author’s notes I take it that was his original intent) or commit to reading all three. That’s assuming the last book pulls the story together better than this one did and answers the larger questions it introduced. ( )

When the important bits of information and story connection came along, they were satisfying, but OMG GET AND EDITOR! It took forever to get to the points and there was just too much repetition, explanation and pointless detail and the story just grinds to a halt all the time. Was so tired when I finished this that I don't even want to get on to the next one. ( )