As Simple As Snow

As Simple As Snow by Gregory Galloway
Anastasia (Anna) Cayne is a complicated high school girl with a penchant for riddles and affectionate mind games, who spends much of her time writing obituaries for every living person in town. She is unlike anyone the narrator has ever known, and her energy and enthusiasm explode his quiet universe, revealing a world of Houdini tricks, strange art, covert messages, and ghost stories-although her past remains an even bigger enigma. Even so, he couldn't be happier. But a week before Valentine's Day, Anna disappears, leaving behind nothing except a dress placed neatly near a hole in the frozen river, and a string of unanswered questions.

The Mysterious Benedict Society and the Perilous Journey

The Mysterious Benedict Society and the Perilous Journey by Trenton Lee Stewart, Diana Sudyka (Illustrator)

Reynie, Kate, Sticky, and Constance, all graduates of the Learning Institute for the Very Enlightened and members of the Benedict Society, embark on a scavenger hunt that turns into a desperate search for the missing Mr. Benedict.

Torn to Pieces

Torn to Pieces by Margot McDonnell
When her mother disappears during a business trip, seventeen-year-old Anne discovers that her family harbors many dark secrets.

Paper Towns

Paper Towns by John Green

One month before graduating from his Central Florida high school, Quentin "Q" Jacobsen basks in the predictable boringness of his life until the beautiful and exciting Margo Roth Spiegelman, Q's neighbor and classmate, takes him on a midnight adventure and then mysteriously disappears.

The Calder Game

The Calder Game by Blue Balliett, illustrated by Brett Helquist
When seventh-grader Calder Pillay disappears from a remote English village--along with an Alexander Calder sculpture to which he has felt strangely drawn--his friends Petra and Tommy fly from Chicago to help his father find him. Books in this series: Book 1. Chasing Vermeer -- Book 2. The Wright 3 -- Book 3. The Calder game.