Can I design book size and background by myself?

Can some flipbook create with PPT software allows users to design book size and background by themselves?

Yes, Flip Powerpoint (free download here) allows users to design book size and background by yourself:

1. Add file: click "File->Import PowerPoint" (for "Quickly import, only import 10 pages to initial preview", of course, you can customize page range to import for previewing);

2. Design Setting: set "Book->Book Proportions" to define pages and background color, shadow, you can also set Tool Bar, then "Apply Change";

3. Output: Click "Convert to Flipping Book" to choose output format from *.html, *.zip, *.exe, or burn to CD, and then click "Convert" to output flipbook in your defined mode.