Twins Joe and Nancy were raised in a circus but on their eleventh birthday they learn their parents are still alive and need their help, so they set out on an quest filled with many extraordinary beings and adventures. Consists of twenty-seven episodes by nineteen authors and pictures by five illustrators.

"A collaboration between the National Children's Book and Literacy Alliance and the Library of Congress's Center for the Book"--Jacket flap. "A progressive story game played by M.T. Anderson, Natalie Babbitt, Calef Brown, Susan Cooper, Kate DiCamillo, Timothy Basil Ering, Jack Gantos, Nikki Grimes, Shannon Hale, Steven Kellogg, Gregory Maguire, Megan McDonald, Frederick L. McKissack, Patricia C. McKissack, Linda Sue Park, Katherine Paterson, James Ransome, Jon Scieszka, Lemony Snicket, Chris Van Dusen."