I found the book very interesting.
It was very interesting reading that book.
I found the book interesting.
I found this book interesting.
That book was very interesting.
That book was really interesting.
I found the book interesting.
I found this book interesting.
I found the book interesting.
This book was very interesting.
Was the book interesting?
This book is interesting and, what is more, very instructive.
This book is interesting, also instructive.
That book is very interesting.
I found the book interesting.
Was that book interesting?
Did you find the book interesting?
This book was very interesting for me.
This book is as interesting as that book.
I found the book interesting.
That book was more interesting than I'd thought.
That book was more interesting than I thought.