In letters to her cousin, a young Jewish girl chronicles her family's flight from Russia in 1919 and her own experiences when she must be left in Belgium for a while when the others emigrate to America.

When the Germans occupy Holland in 1940, twelve-year-old Eva and her family assume false names and move from one hiding place to another.

Nine-year-old Rebecca Rubin eagerly helps her cousin Ana, newly arrived from Russia, to adjust to life in New York City, but when their teacher says the two must sing together at a school assembly, Rebecca worries that her big moment will be ruined.

Ten-year-old Rebecca Rubin is injured during a strike at the sweatshop where her uncle and cousin work when she tries to give a speech, while keeping a big secret from her family.

While Rebecca Rubin helps her building's ailing superintendent take care of his homing pigeons, she puzzles over what to do with the Christmas centerpiece her teacher insisted she make but which has no place in her Jewish home.

Thirteen-year-old Dahlia's reluctance about attending Camp Arava changes to wonder as strange things begin to happen, and soon she is connecting with David Schank, a student of the kabbala, and the maze he built at the camp in the 1930s.

When Rebecca starts helping to watch her neighbors' fussy baby while they are moving in, she becomes convinced that they have been victimized by kidnappers that have been operating in their neighborhood.

Crossing paths at an inn, thirteenth-century travellers impart the tales of a monastery oblate, a Jewish refugee, and a psychic peasant girl with a loyal greyhound, the three of whom join forces on a chase through France to escape persecution.

It was only a few days ago that Tess Biedermann, Theo Biedermann, and Jaime Cruz, along with a mysterious figure from the past, managed to survive an assault on the location of the latest clue in the Morningstarr cipher -- and, in the process, made a shocking discovery about their own connection to this one-hundred-sixty-year-old enigma. Now the friends are divided. Tess and Theo have no idea what the photo they found in Greenwood Cemetery means,...

"It was 1798 when the Morningstarr twins arrived in New York with a vision for a magnificent city: towering skyscrapers, dazzling machines, and winding train lines, all running on technology no one had ever seen before. Fifty-seven years later, the enigmatic architects disappeared, leaving behind for the people of New York the Old York Cipher -- a puzzle laid into the shining city they constructed, at the end of which was promised a treasure beyond...