Archie loves solving problems with her own inventions! One night, Archie spots something mysterious, and she is keen to get to the bottom of it. Is the mystery too big for Archie to solve? Can Archie and her inventions save the day?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.