Pages from 27 through 31, including, are missing in my version, though the content seems to be intact, without any obvious holes. I suspect a simple numbering error on part of the creator.
* Rulebook (corebook 1st ed., largely obsolete by now) * Advanced Fapp (extension of corebook, putting a little bit more 'game' in this game; free) * Fapp Primer (rules primer; free)