It seems that most book-writing programs are geared towards fiction novels. I was so happy to find Atticus. It really seemed like a great program for me to use. After one day I discovered that the navigation pane on the left margin only shows H1 headings. I need H2, & H3 to organize my work. Other programs do not handle Footnote/Endnotes well which is extremely important for me. Guess I have to go back to MS Word.