When historical ships were lost at sea, they took treasure troves down to the depths with them - sometimes gold and silver, but also artefacts, clues and traces of life from centuries ago. This non-fiction book offers in-depth case studies about shipwrecks that have been lost and refound, and the facts about the past that we can gather by searching under the waves.This book is from Readerful's Independent Library. It is for children aged 10 to 11 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.