Blue Sargent has found things. For the first time in her life, she has friends she can trust, a group to which she can belong. The Raven Boys have taken her in as one of their own. Their problems have become hers, and her problems have become theirs. The trick with found things, though, is how easily they can be lost. Friends can betray. Mothers can disappear. Visions can mislead. Certainties can unravel.

Not believing in true love, Blue never thought the warning that she will cause her true love's death would be a problem, but as her life is entangled in the world of the Raven Boys, she's not so sure anymore.

Ronan, Hennessy, and Bryde are dreamers; Ronan's dreams always seem to end in random destruction, using up the power of the ley lines he cannot even sense; Hennessy makes multiple copies of herself, dreaming them into reality in search of her own fragileidentity, and Bryde dreams of power and reordering his companions and the world to his own specifications; their families and duplicates are the collateral damage of their dreams--and meanwhile they...

Four children have discovered that they have spirit animals, a rare bond between human and animal that has launched them on a quest to save their world. The team heads to the forests of Eura, where another Great Beast is hidden.

Now that the ley lines around Cabeswater are awake, magic is swirling around Blue and The Raven boys and Ronan Lynch's ability to pull objects from his dreams is almost out of control but worst of all, the mysterious Gray Man is stalking the Lynch family, looking for something called the Greywaren.

Though she is from a family of clairvoyants, Blue Sargent's only gift seems to be that she makes other people's talents stronger, and when she meets Gansey, one of the Raven Boys from the expensive Aglionby Academy, she discovers that he has talents of his own--and that together their talents are a dangerous mix.