When new kitten Cosmo arrives, Merle isn't happy and refuses to play with him. So when Cosmo discovers a superhero costume, he puts it on and goes exploring instead. Without realising, Cosmo has taken something very valuable - Mega Merle's costume - and the Gerbilator will do anything to get it. Merle must put aside his feelings and save Cosmo, but can he do it without his costume?This book is from Readerful's Independent Library. It is for children aged 6 to 7 to read without support. Readerful is a reading library specially designed to motivate children to read more. The series offers contemporary, inclusive books for children from 4 to 11 years, including: Books for Sharing: picture books to be read aloud by an adult for inspiring reading sessionsIndependent Library: fiction, graphic texts, character mini-series and non-fiction for children to read independentlyRise: fully decodable books for older struggling readers to read independently.How Readerful works: - Read aloud the Books for Sharing for magical reading sessions that motivate children to read more. - Then encourage children to choose a book to read by themselves, from Readerful's Independent Library or from Rise. You'll find links between the books' topics, vocabulary, characters and authors - all designed to keep children reading, boost their vocabulary and develop their knowledge of the world around them.