space and time

Dorrie and her brother Marcus accidently open a portal to Petrarch's Library, where they discover a secret society of warrior librarians who travel in time, protecting the world's greatest thinkers from torture and death for sharing knowledge and ideas.

Spending the summer marooned with her mother and stepfather in a snooty Massachusetts shore town bores Cassandra until she meets a dreamy stranger who claims the year is 1925, sweeping Cassandra into a mystery a hundred years in the making.

Told from his point of view, continues the love story of Bennett, a time traveler from 2012 San Francisco, and Anna, sixteen, of 1995 Evanston, Illinois, as they try to make their relationship work despite his fear that it is not meant to be.

In Avenue of Mysteries, Juan Diego--a fourteen-year-old boy, who was born and grew up in Mexico--has a thirteen-year-old sister. Her name is Lupe, and she thinks she sees what's coming--specifically, her own future and her brother's. Lupe is a mind reader; she doesn't know what everyone is thinking, but she knows what most people are thinking. Regarding what has happened, as opposed to what will, Lupe is usually right about the past; without your telling her, she knows all the worst things that have happened to you. Lupe doesn't know the future as accurately. But consider what a terrible burden it is, if you believe you know the future--especially your own future, or, even worse, the future of someone you love. What might a thirteen-year-old girl be driven to do, if she thought she could change the future? As an older man, Juan Diego will take a trip to the Philippines, but what travels with him are his dreams and memories; he is most alive in his childhood and early adolescence in Mexico. As we grow older--most of all, in what we remember and what we dream--we live in the past. Sometimes, we live more vividly in the past than in the present. Avenue of Mysteries is the story of what happens to Juan Diego in the Philippines, where what happened to him in the past--in Mexico--collides with his future.--Dust jacket.

Eighteen-year-old Ember Pierce has long kept her ability to teleport at night a secret, but now she has been discovered by a handsome fellow teleporter named Caden Hawthorne and enlisted in a military training camp in which she will be used as a weapon for secret missions.

Betrayed by the two people she trusts the most, Josie jumps at the chance to trade places with her twin in a parallel universe until Josie becomes trapped in a dangerous world where shadowy creatures feed on human flesh.

As eighteen-year-old Marguerite struggles to get to the heart of the corrupt company that almost killed her father, she tries to save the boy she loves, whose soul is scattered in various dimensions.

An exploration of the nature of time and space, looking at Einstein's theories of relativity, and the possibility of time travel.

It has been two years since Joseph Harker first Walked between dimensions, met the alternate forms of himself, and formed a team to protect the Altiverse in the struggle between the vicious forces of magic and science--and now, injured, he has returned to his own dimension, bringing danger with him.