When Mina's Grand-papa moves in, Mina thinks he will need lots of rest and quiet. But Grand-papa doesn't seem to agree. The Unexpected Guest is at Oxford Reading Level 12. 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.