If I ever do it...
"So, put a little time into making sure you have no illusions. Protect all that energy that you are investing in your idea by deﬁning and directing it to the right place. Know your customers." Indi Young
It didn't exist back then, but still...
Pearsonified’s Golden Ratio Typography Calculator
Secret Symphony: The Ultimate Guide to Readable Web Typography
The One Concept Approach: How a Professional Designs A Logo
A-Z of Web Typography