Hi. Which is correct or more idiomatic (as the case might be - I don't know)?<br/><br/><i>Which book is good to read?</i><br/><br/><i>Which books are good to read?</i><br/><br/>I think both of these are correct.<br/><br/><i>What books are good to read?</i><br/><br/><i>What book is good to read?</i>