Originally Answered: How do I write my own book?
First, you have to think of a general plot. Whatever you want. Anything you want. It's easier to think about something you've always wanted to do. Did you ever want to be a pilot? Write a story about a pilot who crashes, stuff like that.
Second, decide who you want to be the main and secondary characters. Who's your protagonist? How many friends will he/she have? Who do you want in his/her life? What names do you want to use? Who will be who.
Third, decide where you want it to take place. Places like Alaska or Canada or some made up place like Gotham City! It's all your choice. But, if you pick a real place, you're gonna have to do some research on that place.
Fourth, the book title should be left for last. Until you can think of an appropriate name.
Fifth, write down everything. Everyone makes different types of notes. Decide what type works for you and keep all your ideas dotted down. And slowly, but surely, your story will take its rightful place. Once you have your plot, you can build on that, but be warned:
It's going to take a lot of days, weeks, months (maybe even years) to build a great story long enough for a book. You're going to be changing your mind a lot and you're going to write and erase and replace, but all this will take you to the perfect book. And you're going to have to do some research too. I wish you lots of luck.
P.S. www.fictionpress.com is a place for all authors, famous or not. You can get betas (people who read your stories and fix it and give you tips, ect). You can read, post tries and hopefully get feedback on it. It's a great place to develop your skills. But if you want your book published, don't publish it on a site. No one publisher wants to publish something you can find on the internet for free. I'm a beta on the site. Here's my name for ya: prehistoric-girl .... GOOD LUCK! :)