I found it difficult to read the book.
I thought that book was difficult to read.
I thought that that book was difficult to read.
I'm looking forward to reading that book.
I remember reading that book.
I remember reading the book.
It wasn't until I read the book that I knew about it.
It was not until I read the book that I knew about it.
I remember reading this book.
I found it difficult to read the book.
Few people seem to have read the book.
I am looking forward to reading that book.
You've read through the book, haven't you?
I felt really happy after reading this book.
The book has enlightened me on many points.
I should have read that book.
I should read the book.