I'm looking for sci-fi novels, please I'm thirsty of more.

When I was younger, 14 or so I loved the horror of Lovecraft and Poe, also liked Chambers. Then I read some classics like To Kill a Mockingbird and Lord of the Flies, but what really got me before 18 (I'm 19) was Metro 2033 and Roadside Picnic. I just read those two because I liked the games, Metro and S.T.A.L.K.E.R, but the books stories were 100% my taste, and now I need more. I don't know much about the Strugatsky brother's novels but I'm looking into reading em. But I also want to know more authors and good sf novels.