I had been reading about an hour when he came. 5 вопросов к предложению

Question

I had been reading about an hour when he came. 5 вопросов к предложению

Answer 1

What kind of book you read?
Is that book interesting for you?
Do you have a plan to complete reading when I go out?
How many hours you need to complete reading?
May I come tommorow and get answer for the second question?