Free summer reading - if you are assigned older classic books as part of your summer reading you may be able to get them for free from Project Gutenberg. Here is a list 100+ free commonly assigned books.
from /r/books
暑期免费阅读--如果你被分配到较老的经典书籍作为暑期阅读的一部分，你可能可以从古腾堡计划中免费获得这些书籍。这里有一个100多本免费的通常分配的书籍清单。