Dear Polly,    
    I'm so happy to get your letter. It's wonderful that reading is your hobby! 
    As for me, I like reading and books play a very important role in my life. Unfortunately I don't have enough time for reading because I 'm busy with my studies. That's why I don't spend a lot of time on reading. I read a lot in summer when I 'm on holiday. Of course, I like adventure novels best of all.
    At the same time I read newspapers and magazines. As for my favourite book in my childhood, it was Cinderella. I read it a lot of times.
    Write back soon! 
    With love, (твое имя) .