Piper Thought Taking Care Of Cosmo, Her Magical Pet Slime, Was A Big Responsibility. Now She's On A Mission To Keep Him Safe From A Nefarious Corporation! Join Piper And Cosmo On An Out-of-this-world Adventure In Book 3 Of The My Pet Slime Series. After Her Pet Slime Came To Life And Her Grandma Got Kidnapped, Piper Didn't Think Life Could Get Any Stranger. But Then She Found Herself Trapped In The Headquarters Of The Mysterious Mala Corporation With Her Grandma Sadie, Her Enemy-turned-friend Claire, And Cosmo, Her Pet Slime. Luckily, Piper Has An Out-of-this-world Plan To Escape From Mala And Make Sure Sweet, Cuddly Cosmo Stays Safe Forever!