Andre Calilhanna is the editor and manager of the BookBaby blog. He's a musician, songwriter, writer, marketer, husband, dad, soccer board member, and soon-to-be author. Check him out at Twitter.com/dre_cal.
When it comes to professional book production, the interior formatting is absolutely critical. Whether the pages have two columns or one column, the type and size of font that's used, the spacing... all of that is very important.