I pretty much agree with what everyone has already said,
Although I'm not really one to ask about writing books, as I'm a terrible writer who likes to repeat herself and use quotes by other people more than I ever say anything original!
However after a brief google search I found
this link which seems to be quite useful.
Just stick to it and keep writing down everything you can think off, I'm sure you will achieve your goal through hard work, but I find that the harder you work the better the end result feels.
Good Luck!