Now github orders files the wrong way. I suggest solving this by adding a leading zero to numbers < 10
Before:
part1.md
part10.md
part11.md
part12.md
part13.md
part14.md
part2.md
part3.md
part4.md
part5.md
part6.md
part7.md
part8.md
part9.md
After
part01.md
part02.md
part03.md
part04.md
part05.md
part06.md
part07.md
part08.md
part09.md
part10.md
part11.md
part12.md
part13.md
part14.md