Jay is reluctant to spend the holiday at his grandma's house and feels angry at everyone. But when he storms off into the snow, he finds something unexpected. Lost in the Hills is at Oxford Reading Level 15. It is for readers aged 11 to 13 years old who are working below expected standard in their reading. The Readerful Rise series ensures that older struggling readers have books with age-appropriate content and topics, that looks like the books their peers are enjoying, but are a written at a level they can read successfully.