In my opinion both are wrong. I think it should be, shcho23 1) I think it is difficult reading this book. shcho23 2) I think reading this book is difficult.
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shcho231) I think it is difficult reading this book.
shcho232) I think reading this book is difficult.Shravan.
shcho231) I found, it is difficult reading this book.
shcho232) I found, reading this book is difficult."I found, it is difficult to read this book".