Well, it's hard to explain without giving out some major spoilers of the books, but the series is more serious than you might think. People do die in the books and because of that, it might not be for everyone. It's not really a book series for younger kids unless they're mature enough to handle it. Even then, there are some aspects that just aren't age appropiate. But the are happy and funny moments too, it's not just some morbid book filled with death. I just thought you should know there are some serious and dark themes in the books before you go reading them. wall of text :p
Well as far as I know, there are five main books in the main series, and two grahpic-novel prequels. I'm not entirely sure, because I'm just looking off Wikipedia. I haven't gotten to the fourth and fifth book yet either. There have been some pretty dark moments in the books I HAVE read, so just a warning.
While it's not a sci-fi book, one book series that I would recommend is Odd Thomas, by Dean Koontz. It's a thriller/mystery about person who can see and talk to ghosts. I can't really think of a good way to describe it, I just think it's a good book series.
That actually sounds pretty cool, I'll have to read that one day. I read a lot of books of books by John G. Hemry (pen name Jack Campbell,) Eric Nylund, Tom Clancy and such, sticking to the whole, "I like sci-fi," deal. The Lost Fleet, by Jack Campbell, is a favorite on-going series of mine.
i read a sci-fic once it was about a boy who got in an accident and fragments of a shattered iPhone are embedded in his brain and then he has powers like accessing the internet, hacking and all
i don't remember much i read it a few years ago link
i mostly like hardy boy books, percy jackson , alex rider and all