STRIP()

Question

Guys I'm finding it difficult to understand the strip() method
file = open("/usercode/files/books.txt", "r")
books = file.readlines()
print(books)

if this code gets printed, you'd get a list of words with the new line code"/n", but when you print this

file = open("/usercode/files/books.txt", "r")
books = file.readlines()
books = [x.strip() for x in books]
print(books)
The new line symbol gets deleted somehow. I'm confused cause i thought the strip only works when you specify the characters you want to remove in the parenthesis like this---> strip("\n").