The deceivers

"Until their mother vanished, the Greystone kids--Chess, Emma, and Finn--knew nothing about the other world. Everything is different there. It's a mirror image, except things are wrong. Evil. Their mother tried to fix it, but she and an ally got trapped there along with Ms. Morales, their friend Natalie's mom. Now the four kids--brave Chess, smart Emma, kind Finn, and savvy Natalie--are determined to rescue everyone. To do so, they have to go bac...