TY - BOOK AU - O'Ryan,Ray AU - Kraft,Jason TI - Operation twin trouble T2 - Galaxy Zack SN - 148144400X PY - 2015/// CY - New York PB - Little Simon KW - Brothers and sisters KW - Juvenile fiction KW - Friendship KW - Human-alien encounters KW - Sisters KW - Twins KW - Science fiction KW - lcgft N1 - Ages 5-9 N2 - "Zack's twin sisters are best friends, but when the two get into an argument while visiting another planet, Zack finds himself stuck in the middle of a tricky twin situation"-- ER -