the way to read an English book

I bought a English book which suits my current English level on the internet two monthes ago.
There are many words which I don't know. I underline them with a red pencil and then I look them up in a dictionary.
I think it takes a lot of time to read the book. I am bothering how to read it faster.
I asked one of my foreign friends how to understand an english book. She told me her way to read an english book.
At first, she always underlined new words as she was reading it. After she finished reading the book,
she looked up the new words and then she read the book again to see if she could understand the story of the book.

I am trying to read the book in this way.

This is very good. Well done!

the way to read an English book

I bought an English book which that suits my current English level on the internet two monthes ago.
I have many words which I don't know. There were lots of words that I can't understand.  I underlined them with a red pencil pen and then I look them <em>up</em> in a dictionary.
I think  By doing that, it takes a lot of time to read the book and it bothers me because I want to read the book faster. I am bothering how to read it more fast.
I asked one of my foreign friends how to understand an english book. She told me her way to read an english book.
At First, she always used to underline new words she can't understand as she was reading reads it. After she finished reading the book, When she's done reading the book, she will looked the meaning up the new of the underlined words and then she will read the book again. if so, By doing that, she could can understand the story of the book.

I am trying to read the book in the that way.

The way to read an English book

I bought a English book which suits my current English level on the internet two monthes ago.
It has many words which I don't know. I underline them with a red pencil and then I look them up in the dictionary. I think it will takes me a long time to read the book. I am bothering wondering how to read it more faster.

{This may not be what you meant. Perhaps you meant, "It bothers me that I can't read it faster."}

I asked one of my foreign friends to how she reads and understands an English book. She told me her way to read an English book.
At first, she always underlined new words as she was reading it. After she finished reading the book,
she looked up the new words and then she read the book again. if so, Then she could understand the story of the book.

I am trying to read the book (in) that way.

[Good for you!]