Betti on the High Wire by Lisa Railsback

From the Publisher: "Ten-year-old Babo and the other "leftover kids" live on an abandoned circus camp in a war-torn country. Babo believes her circus-star parents will come back for her any day now, so she is not one bit happy when an American couple adopts her. She hates her new name (Betti) and is confused by everything in America. She's determined to run away. But as Betti slowly begins to trust her new family and even makes a friend, she decides maybe she can stay just one more day."

Publisher: Penguin, 2010, 288 pp.

Henrietta Hornbuckle's Circus of Life by Michael de Guzman

From the Publisher: "As far as twelve-year-old Henrietta Hornbuckle is concerned, she has the best existence on the planet.  She is a clown in a small traveling circus.  Everyone she knows, including her parents, are clowns.  What Henrietta doesn't know is that this summer big  changes are waiting in the wings."
Publisher: Farrar Straus Giroux, 2010, 160 pp.