Heidi loves living with her grandfather, high in the mountains. But then her aunt arrives to drag her off to the stifling city. "I'll never forget Grandfather," Heidi promises herself.“One day I'll come back to him.”

USBORNE图书馆系列到LEVEL6之后，词汇量增加到2000-2500，每页的文字数量在十行左右，共64页，涵盖了英文大部分的语态和时态。从这个级别开始，已正式进入到章节阅读。适合七八年级作为词汇量扩展读本。Level6系列均为世界知名的民间故事和童话故事以及传记，学生一般都已接触过中文版本。