Working with all kinds books, I often need inspiration for a set of sectioning styles that are coherent, logical and aesthetically appealing. Well-known examples include Edward Tufte and the style used in Robert Bringhurst's The Elements of Typographic Style. They are beautiful but typically limited to chapter title, section and subsection. Frequently, I need a set of styles with more depth—chapter title, section, subsection, subsubsection, paragraph, subparagraph, etc.
I would kindly like to ask you to show your examples—all the better if the example includes LaTeX source. If you refer to a specific author or publication, it would be useful to include an online example, or at least an image.
The mentioned examples are typically limited to chapter title, section and subsection. At times, I need a set of styles with more depth—chapter title, section, subsection, subsubsection, paragraph, subparagraph, etc. So sets with more depth are greatly appreciated.