Tala's got her brother into trouble. She hopes that visiting the Lake of Secrets will fix things! Then she discovers that it might not be so simple ... Tala and the Lake of Secrets is at Oxford Reading Level 10. It is for readers aged 7 to 11 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 look like the books their peers are enjoying, but are written at a level they can read successfully.