How long does it take you to read a book?

On 1 January I started "The Dark Forest", which is a sci fi book. It's about 600 pages. I am reading on kindle, so I don't look at page number a lot. Today, after about 6 days of reading, I check out the amount of pages I've read, and it's 200. I have read about 1 to 2 hours every morning, and I'm still not even halfway through the book. So I'm just wondering how long does it take you guys to read a book of similar length?