Sorry for asking, but an iron-curtain seems to have settled in my brain...
I'm looking for a ebook about typography and how to best write/typeset a book. It used to be part of the documentation for some TeX/LaTeX package (I assume to help typeset books and similar), but was later split into a separate package. It's available both as a TeX/LaTeX-sourcefile and as a PDF.
The book gives a brief history of and introduction to typography - Gutenberg, lead-types, old-style printing-presses, different measurements used; as well as a descriptions of the various parts of a typical book - foreword, introduction, title-page, copyright-page (what that string of number means), and so on. I only read the two first chapters, but I got the impression the book would be about how to typeset and section books.
Anyway, since I don't remember the name of the packages (the original and the one with just the book), the webpage (I think it had one), the author nor the title; I'm asking here - does anybody remember this ebook?