I no longer have the book [someone took it years ago], but there was an excellent book explaining fonts and how to legibly use them. If anyone knows the name, it would be a huge advantage in anyone's library. It's up there with Mike Steven's stuff.
It provided examples of which fonts work with what kind of businesses and how to mix and match fonts within a single display.
It also showed how and why certain fonts worked in one display and not another. It put fonts into I think 5 or 6 categories and if you read the book over and over..... so much of it made sense back when it was written throughout til today with all the many more fonts and impostors available. The book explained what type styles were originally designed for and how to use them effectively. It wasn't so much a pick what i like kinda deal, as much as what styles got your point across o the masses.
It would do a lot of good for many of you designers to read up on types styles, fonts and their usage.