Adobe's Type 1 Font Format book in PDF format. Don't forget to get the Adobe Technical Note #5015, Type 1 Font Format Supplement as well, which discusses multiple master fonts and counter hints.

EXTERNAL LINKS
Adobe black book
Google search page

INTERNAL LINKS
Type 1 font software ⦿ Books on type design ⦿

Luc Devroye ⦿ School of Computer Science ⦿ McGill University Montreal, Canada H3A 2K6 ⦿ lucdevroye@gmail.com ⦿ http://luc.devroye.org ⦿ http://luc.devroye.org/fonts.html