Collins Big Cat supports every primary child on their reading journey from phonics to fluency. Top authors and illustrators have created fiction and non-fiction books that children love to read. Levelled for guided and independent reading, each book includes ideas to support reading. Teaching and assessment support and eBooks are also available.When best friends Serafina and Harry learn that a marine expert is coming to visit their island, they’re thrilled! Perhaps she will help them with their mission to clean up the beaches on the island. But when Serafina’s Grandpa goes missing, they quickly realise that all is not as it seems, and that help sometimes comes from the unlikeliest of places!Topaz/Band 13 books offer longer and more demanding reads for children to investigate and evaluate.Pages 30 and 31 allow children to re-visit the content of the book, supporting comprehension skills, vocabulary development and recall.Ideas for reading in the back of the book provide practical support and stimulating activities.