Brainstorm
Brainstorming is the best thing about writing a book or making a poem. You don't need any specific topic. Anything goes at this point. Make a category, and list different things in that category until you have a full sheet of paper.
Draft It
Get on Word or something and start organizing your brainstorms. You'll see a story start to take place a little, wait a while, let your ideas take control and become your hands in which they type on your computer.
Read Over
Read over what you have so far. If you are satisfied, you are good to go. Write the rest of your story, and go to the next step.
Proofread
You know what this is. Open up the old spell check and correct any typo's that you may have. This will make your story seem more professional.
Final Draft
Go ahead and critique and add and remove some things from and to the story...
Imagine
Print and have fun. Draw on the pages to your hearts content. Just make the book satisfactory to you. I hope this helped.