"Despite all of the odds, Joan achieved the impossible. She reset the timeline, saved her family--and destroyed the hero, Nick. But her success has come at a terrible cost. She alone remembers what happened. Now, Aaron, her hard-won friend--and maybe more--is an enemy, trying to kill her. And Nick, the boy she loved, is a stranger who doesn't even know her name. Only Joan remembers that a greater and more dangerous enemy is still out there. When a...

Seventeen-year-old Korean American Mina Lee's life is disrupted when she finds herself sucked into the world of her own webcomic.

Fleeing to the U.S. border, Sitlati finds a conch shell detailed with ancient markings that connects her to Calizto, a young Aztec warrior in 1521 Tenochtitlan, and together they fight to survive--and for their love--across centuries.

Ten-year-old Kara follows mysterious tracks in the snow that lead her across time and space from modern-day Sweden to 1942 Germany where two siblings are hiding from the Nazis.