Woah!
When I read the 1st book, I read for a couple of times a week and I only read for 1-hour sessions. It took me about half the year to finish the 1st book.
But when I read the 2nd book, I read for longer sessions and like every day, and it took me about a few weeks to finish this book.
And I am yet to finish the 3rd book which I started a few days ago. And I have been reading it for around 2-3 hour sessions.
One day a long time ago I read all 8 books of Deltora Quest 1 in less than 12 hours. But each book was very short. I am also assuming you have got no idea what is Deltora Quest is, right?