Well the thing to know about the HP books is that the year each book represents was written generally for that age group of the students attending the school, so the first 3 books are going to seem somewhat childish. I would still read them as they are great books and have important plot points for later in the series, I just like to warn people of that so they don't get discouraged and give up before finishing the series because the last 4 books are much more interesting and fun to read.