Quick mention for FontShop’s education page that includes useful typography PDFs.
PDFs on offer:
Meet Your Type: A Field Guide to Typography (52 pages)
Erik Spiekermann’s Typo Tips: Seven Rules for Better Typography (9 pages)
Type Anatomy: A Primer of Typographic Terms (2 pages)
The Right Font for the Job: Beyond the Look of the Letter (9 pages)
Via We Made This.