以下是一些适合高中生阅读的英文原版小说：

1. To Kill a Mockingbird by Harper Lee
2. The Great Gatsby by F. Scott Fitzgerald
3. Animal Farm by George Orwell
4. 1984 by George Orwell
5. Lord of the Flies by William Golding
6. The Catcher in the Rye by J.D. Salinger
7. The Outsiders by S.E. Hinton
8. The Hobbit by J.R.R. Tolkien
9. The Chronicles of Narnia by C.S. Lewis
10. Harry Potter series by J.K. Rowling

这些小说涉及的主题和情节都比较适合高中生，而且语言也不算太难，可以帮助提高英语阅读技能。此外，这些小说也都是文学经典，读完后可以增加阅读体验和文化知识。