Another alternative: As a book lover, I read all kinds of books in my free time. (or in my spare time)

No, remove the words "and considering this matter" for example. I am a book lover! (with a smile) I read different kinds of books in my free time. I am a book lover! (with a smile) and so, I read different kinds of books in my free time.

I'm not teacher but this is my opinion: I'm not sure if say "considering this matter" is appropriate, I've never heard it.. I would say "I'm a book lover and considering this I read.."